How to Throw a Four Seam Fastball: Grip, Mechanics, and Velocity Tips
Last updated: March 01, 2026
The four seam fastball is the most fundamental pitch in baseball. Every pitcher who has ever taken the mound has thrown one, and every pitcher who wants to compete at higher levels needs to throw one well. I have spent years coaching pitchers from Little League through college ball, and the four seam fastball is always where I start. It is the foundation that every other pitch builds upon.
In this guide, I am going to walk you through everything you need to know about the 4 seam fastball grip, the mechanics behind generating velocity, common mistakes that kill your speed and accuracy, and the drills I use with my pitchers to develop a dominant fastball. Whether you are a youth pitcher learning your first pitch or a high school arm looking to add a few ticks, this is the complete breakdown.
What Makes a Four Seam Fastball Different
The four seam fastball gets its name from the way the ball rotates out of your hand. When thrown correctly, all four seams cut through the air on every rotation, creating maximum backspin. This backspin generates what physicists call the Magnus effect, which fights against gravity and makes the ball appear to rise or stay on a flatter plane longer than a hitter expects.
Compared to a two seam fastball, the four seamer trades movement for velocity and perceived rise. A two seam fastball typically runs 1 to 3 mph slower and generates horizontal and sinking movement because only two seams catch the air per rotation. The four seam fastball is straighter, faster, and when thrown up in the zone, one of the hardest pitches in baseball to square up.
According to MLB Statcast data, the average four seam fastball velocity in the major leagues sits around 93.5 mph. But velocity alone does not make a great fastball. Spin rate matters just as much. The MLB average spin rate on a four seam fastball is roughly 2,250 RPM, and pitchers who generate spin rates above 2,400 RPM see significantly more swings and misses, even at the same velocity. Spencer Strider, for example, generated elite results with a fastball that combined 97 mph velocity with 2,500-plus RPM spin rate, producing a ride effect that made hitters swing under the ball consistently.
Equipment You Need
Before we get into the grip and mechanics, here is what you need to practice your four seam fastball effectively:
- Regulation baseballs — Use official size and weight balls (5 to 5.25 ounces, 9 to 9.25 inch circumference). Practicing with undersized or oversized balls changes your grip mechanics. I recommend getting a bucket of baseballs for extended sessions.
- A glove that fits properly — You need a quality baseball glove to practice your full motion. A glove that is too big or too small affects your hand transfer and timing.
- A target or catcher — A strike zone net, pitch target, or live catcher. You cannot develop command throwing into open space.
- A radar gun (optional but helpful) — Tracking your velocity helps you measure progress. A pocket radar gun gives you instant feedback on whether your mechanical changes are producing results.
- Weighted balls (for advanced training) — Plyo balls or weighted baseballs in the 3.5 oz to 7 oz range can help develop arm speed when used correctly as part of a structured program.
- Resistance bands — J-bands or similar shoulder tubing for arm care and warm-up routines. Every throwing session should start with band work.
- Video recording device — A smartphone on a tripod works fine. Recording your mechanics from the side and behind is the fastest way to identify flaws you cannot feel.
The 4 Seam Fastball Grip: Step by Step
Getting the grip right is the single most important thing you can do to throw a better four seam fastball. Here is exactly how I teach it:
Step 1: Find the horseshoe. Hold the baseball in front of you and rotate it until you can see the seams forming a horseshoe or “C” shape. The open end of the horseshoe should face away from your throwing hand.
Step 2: Place your index and middle fingers across the seams. Your fingertips should sit directly on top of the two seams that run horizontally across the top of the horseshoe. The seams give your fingers something to grip and pull against at release, which is what generates backspin. Space your fingers roughly a half inch to three quarters of an inch apart. Too wide and you lose control. Too narrow and you lose spin efficiency.
Step 3: Position your thumb underneath. Your thumb should rest on the bottom of the ball, roughly on or near the bottom seam, directly between your two top fingers. Think of your index finger, middle finger, and thumb forming a triangle around the center of the ball. The thumb provides the base of support, not a squeeze point.
Step 4: Keep the ball off your palm. This is where most young pitchers go wrong. There should be a visible gap between the ball and your palm. If the ball is jammed back into your hand, you are gripping too tightly and you will lose velocity. Think of holding an egg firmly enough that it does not slip out, but loosely enough that you would not crack it.
Step 5: Apply pressure with your fingertips, not your hand. The last point of contact at release should be your index and middle fingertips pulling down on the seams. This is what creates the tight backspin that makes a four seam fastball effective. Your ring finger and pinky should rest comfortably on the side of the ball but should not be squeezing.
One thing I tell every pitcher: your grip should feel the same every single time. Before every pitch, take a moment in your glove to feel the seams and set the grip. Consistency in your grip creates consistency in your spin, which creates consistency in your location.
Mechanics That Generate Velocity
The grip is only one piece of the puzzle. Velocity comes from your entire body working in sequence, from your legs through your core and into your arm. Here is the mechanical chain I focus on with every pitcher I work with:
Leg drive and push off. Power starts from the ground. Your back leg should drive off the rubber aggressively, not just fall off it. Think about pushing the rubber away from you. Pitchers who generate strong leg drive typically see 2 to 4 mph velocity gains compared to pitchers who simply lift and fall toward the plate. Your front foot should land slightly closed, about 1 to 3 inches to the glove side of a straight line toward home plate.
Hip-to-shoulder separation. This is the biggest velocity generator in the kinetic chain. Your hips should begin rotating toward the plate while your shoulders stay closed. This creates a stretch across your core, like winding a rubber band, that releases explosive rotational energy. Studies from the American Sports Medicine Institute (ASMI) show that elite pitchers generate 40 to 60 degrees of hip-to-shoulder separation, while amateur pitchers often achieve only 20 to 30 degrees.
Arm action and slot. Your throwing arm should follow a natural path. I teach a “down, back, and up” arm action where the hand breaks from the glove downward, moves behind the body, and then comes up into a high cocked position. The elbow should reach roughly shoulder height or slightly above at foot strike. Dropping the elbow significantly below the shoulder increases stress on the UCL and reduces velocity potential.
Trunk rotation and forward flexion. As your shoulders unwind toward the plate, your chest should drive forward aggressively over your front leg. Pitchers who get good forward trunk tilt — leaning out over the front knee at release — effectively release the ball closer to the plate, which increases perceived velocity. A pitcher who releases the ball 2 feet closer to home plate at the same 90 mph creates the same reaction time for a hitter as a pitcher throwing 92 to 93 mph from a more upright position.
Release point consistency. The release point for a four seam fastball should be out in front of your body, just past your front foot. Your wrist should be behind the ball, fingers on top, and you should feel like you are pulling down on the seams as you let go. Do not try to throw harder by muscling the ball with your arm. The arm is the whip, not the engine. The legs and core are the engine.
Common Mistakes That Kill Your Fastball
I see the same mistakes over and over again with pitchers at every level. Here are the most common ones and how to fix them:
| Mistake | What Happens | How to Fix It |
|---|---|---|
| Gripping the ball too tight | Reduces wrist speed, kills spin rate, drops velocity by 2-4 mph | Hold the ball with fingertip pressure only. Leave a gap between the ball and your palm. Think firm but relaxed. |
| Ball buried in the palm | Eliminates backspin, ball sinks or cuts instead of riding, loses 3-5 mph | Check for daylight between the ball and your palm. Practice your grip in front of a mirror daily. |
| Fingers too wide apart on seams | Loss of command, inconsistent spin axis, ball runs or cuts unpredictably | Keep fingers roughly half inch to three quarter inch apart. Find a consistent spacing that feels natural. |
| Dropping the elbow below shoulder | Increased UCL stress, loss of downward plane, reduced velocity | Film yourself from behind. At foot strike, your elbow should be at or slightly above shoulder height. |
| Opening the front shoulder early | Kills hip-to-shoulder separation, loses 3-6 mph, exposes the ball to hitters | Keep glove side closed longer. Point your glove at the target until your hips start to open. |
| Short striding | Reduces momentum, forces arm to do all the work, velocity loss of 2-5 mph | Aim for a stride length of 85-100% of your height. Practice with a chalk line to measure. |
| Falling off to the glove side | Inconsistent release point, poor fielding position, loss of direction and command | Drive your chest toward the target. Finish with your throwing shoulder pointing at the catcher. |
| Pushing the ball instead of throwing it | Short arm action, ball comes out flat, velocity drops significantly | Let your arm work in a natural circle. The ball should travel down, back, and up before accelerating forward. |
| Not using the lower half | All arm, reduced velocity, higher injury risk, fatigue by the 4th inning | Practice crow hops and long toss to feel your legs driving the throw. Your legs should feel tired before your arm. |
| Overthrowing with the arm | Muscling up causes tension, actually reduces velocity, increases injury risk | Focus on moving fast, not throwing hard. Let your body create the speed and your arm will follow. |
Four Seam Fastball vs Two Seam Fastball: When to Use Each
Understanding when to throw a four seam versus a two seam fastball is critical to effective pitching. Here is how I think about it:
| Factor | Four Seam Fastball | Two Seam Fastball |
|---|---|---|
| Velocity | Fastest pitch in your arsenal, typically 1-3 mph faster than two seam | Slightly slower, trades speed for movement |
| Movement | Minimal horizontal movement, strong backspin creates perceived rise | Arm-side run and sink, keeps ball on the ground |
| Best location | Up in the zone, above the belt, letters and above | Down in the zone, glove side or arm side of the plate |
| Best count | 0-0, 0-2, 1-2 — when you want swings and misses or called strikes | Ahead in count when you want weak contact and ground balls |
| Spin rate importance | Critical — higher spin creates more ride and more swings and misses | Less important — lower spin can actually improve sink |
| Ground ball rate | Lower, around 35-40% at the MLB level | Higher, around 48-55% at the MLB level |
| Whiff rate | Higher when thrown up, around 25-30% for elite four seamers | Lower, around 15-20%, designed for weak contact |
The best pitchers in baseball use both. A four seam fastball up in the zone paired with a curveball or changeup down creates devastating vertical separation. Gerrit Cole, for example, lives up in the zone with his four seamer and then buries his slider and knuckle curve below the zone. The eye-level change from high to low is what makes hitters look foolish.
Drills to Improve Your Four Seam Fastball
These are the drills I use with my pitchers, ordered from basic to advanced. Incorporate these into your training 3 to 4 times per week for the best results.
Drill 1: Wrist Snap Drill
Purpose: Isolate the wrist and fingers to improve spin rate and backspin efficiency.
Kneel on one knee about 10 feet from a partner or net. Hold the ball in your four seam grip with your elbow at 90 degrees at shoulder height. Using only your wrist and fingers, snap the ball toward the target. Focus on pulling down on the seams with your fingertips. You should see tight backspin with the ball rotating on a true vertical axis. Do 3 sets of 15 throws. If the ball wobbles or has sideways spin, your grip or finger pressure is off.
Drill 2: Towel Drill for Mechanics
Purpose: Develop proper arm path, extension, and release point without arm stress.
Roll up a hand towel and grip it like a baseball. Go through your full windup or stretch delivery and snap the towel toward a target (a partner’s glove works well). The towel should make a clean snap at the point where you would normally release the ball. If the towel snaps too early, you are cutting your extension short. If it does not snap at all, you are not accelerating properly through the release point. Do 2 sets of 10 reps from both the windup and stretch.
Drill 3: Long Toss Program
Purpose: Build arm strength, develop body mechanics, and increase velocity over time.
Start at 60 feet and gradually work back to your maximum comfortable distance (most high school pitchers should work to 180 to 250 feet, college arms to 300 feet). Use your four seam grip on every throw. At shorter distances, throw on a line. As you work back, let the ball arc naturally but maintain your grip and spin. After reaching your max distance, work back in to 60 feet, trying to maintain the same arm speed and body involvement from long distance. This teaches your body to produce velocity through the kinetic chain rather than just the arm.
Drill 4: Hip-Lead Drill
Purpose: Develop hip-to-shoulder separation and lower-half engagement.
Start in your set position on the mound or flat ground. Lift your leg as normal but pause at the top of your leg lift. From this balance point, initiate your move toward the plate by pushing your hip forward first while keeping your shoulders and throwing arm back. You should feel a stretch across your midsection. Then complete the throw. Film this from behind to see if you are achieving 40-plus degrees of separation between your hips and shoulders. Do 2 sets of 8 throws at 70 to 80 percent effort.
Drill 5: Flat Ground Command Work
Purpose: Develop location and repeatable mechanics in a low-stress environment.
Set up a strike zone target at the regulation distance from flat ground. Throw 30 to 40 four seam fastballs, alternating between four quadrants of the zone: up and in, up and away, down and in, down and away. Track your percentage in each quadrant. Elite pitchers hit their target 60 percent of the time or better. If you are below 40 percent, slow down, reduce effort to 80 percent, and focus on mechanical consistency before adding intensity.
Drill 6: Connection Ball Drill
Purpose: Keep the throwing arm connected to the body through the delivery, improving timing and sequencing.
Place a small ball or towel between your throwing elbow and your torso. Go through your delivery while keeping the ball in place until your shoulders begin to rotate. The ball should fall naturally as your arm accelerates into the throw. If the ball drops early, you are disconnecting your arm from your body too soon, which creates a long, inefficient arm path. Do 2 sets of 8 throws at moderate effort.
Advanced Tips for Adding Velocity
Once you have your grip and basic mechanics locked in, here are the advanced concepts that separate good fastballs from elite ones:
Train for rotational power. Your fastball velocity is heavily influenced by how fast your trunk rotates. Medicine ball throws — rotational scoop tosses, overhead slams, and pivot pickoffs — build the explosive core strength that translates directly to pitching velocity. Research from Driveline Baseball shows a strong correlation between medicine ball rotational velocity and fastball velocity. Pitchers who improved their med ball scoop toss by 2 mph typically saw a 1 to 1.5 mph gain on their fastball.
Optimize your stride length. Stride length has a direct relationship with velocity. The target is 85 to 100 percent of your height. A 6-foot pitcher should stride approximately 5 feet 1 inch to 6 feet. Increasing stride length by just 6 inches, when accompanied by proper mechanics, can add 1 to 2 mph. Measure yours during bullpens and work to gradually extend it without sacrificing balance.
Improve your spin efficiency. Spin rate matters, but spin efficiency matters more. Spin efficiency measures how much of your total spin contributes to backspin (the useful kind for a four seamer). A pitcher with 2,200 RPM and 95 percent spin efficiency will get more ride than a pitcher with 2,400 RPM and 80 percent efficiency. Focus on keeping your fingers directly behind the ball at release, not off to the side. If your four seamer has consistent cut or run, your spin efficiency is low, and you need to adjust your finger position at release.
Use weighted ball training carefully. Weighted ball programs, when done correctly under supervision, have been shown to increase velocity by 2 to 3 mph over 6 to 8 week training cycles. Driveline Baseball’s research shows the greatest gains come from using a blend of underweight (3.5 oz), regulation (5 oz), and overweight (7 oz) balls in structured programs. However, weighted balls also increase arm stress. If you are under 16, I strongly recommend working with a qualified pitching coach before starting any weighted ball program. The risk of arm injury is real if these are used incorrectly.
Master the concept of perceived velocity. You do not need to throw 95 mph to have an effective four seam fastball. Perceived velocity — how fast the pitch appears to the hitter — is influenced by extension, release point, and deception. A pitcher who hides the ball well in their delivery and releases it 6 feet in front of the rubber at 89 mph creates the same reaction time as a pitcher who throws 92 mph but releases it 5 feet in front. Work on getting your chest out over your front leg and releasing the ball as far in front of your body as possible.
Pitch tunneling with your fastball. The most advanced use of a four seam fastball involves tunneling it with your off-speed pitches. The idea is that your fastball and your slider, curveball, or changeup should look identical to the hitter for as long as possible before diverging. If your four seamer up and your curveball down look the same through the first 20 feet of flight, hitters have to guess rather than react. This is how pitchers like Corbin Burnes and Kevin Gausman dominate despite not having the hardest fastballs in baseball.
Velocity Benchmarks by Age and Level
Knowing where you stand compared to other pitchers at your age and level helps you set realistic goals. Here are the general four seam fastball velocity benchmarks I use:
Youth (10 to 12 years old): 45 to 55 mph is average, 55 to 65 mph is above average. At this age, focus on mechanics and command, not velocity. Pitchers who throw hard at 12 often peak early if they do not develop proper mechanics.
Middle school (13 to 14): 55 to 65 mph is average, 65 to 75 mph is above average. This is when physical development starts to create bigger velocity gaps between players. Make sure you are following pitch count guidelines at this age.
High school freshman and sophomore (14 to 16): 65 to 75 mph is average, 75 to 82 mph puts you on the varsity radar. Velocity gains of 3 to 5 mph per year are common during growth spurts.
High school junior and senior (16 to 18): 75 to 85 mph is average, 85 to 90 mph makes you a college prospect. Throwing 90 or above in high school puts you in elite territory, as fewer than 5 percent of high school pitchers reach that mark.
College: 85 to 90 mph is typical for Division 1 arms, 90 to 95 mph for weekend starters and closers at top programs. The average college starting pitcher sits around 87 to 89 mph.
Professional: The MLB average four seam fastball velocity has climbed from 91.6 mph in 2008 to approximately 93.5 mph. Elite relievers routinely sit 97 to 100 mph. Starting pitchers who can maintain 95-plus deep into games are highly valued.
Arm Care and Injury Prevention
Throwing a four seam fastball at maximum effort puts significant stress on your arm, particularly the ulnar collateral ligament (UCL) in the elbow and the rotator cuff in the shoulder. Here is how to keep your arm healthy while developing your fastball:
Always warm up properly. Every throwing session should begin with 5 to 10 minutes of band work targeting the rotator cuff and scapular stabilizers. Follow that with a progressive long toss routine, starting at short distance and gradually increasing. Never pick up a ball and start throwing at full effort cold. Check out these scapula exercises for a solid warm-up foundation.
Follow pitch count guidelines. Youth and high school pitchers should follow established pitch count limits. A 15 to 18 year old pitcher should not exceed 95 to 105 pitches per outing, and should have adequate rest between outings. The research is clear: overuse is the single biggest risk factor for Tommy John surgery.
Build a consistent arm care routine. J-band exercises, sleeper stretches, posterior capsule stretches, and lightweight rotator cuff work should be done before and after every throwing session. This is not optional. The pitchers who stay healthy over long careers are the ones who treat arm care as seriously as their bullpen sessions.
Monitor workload across all throwing. Your arm does not know the difference between bullpen pitches, game pitches, and long toss throws. Track your total weekly throwing volume and make sure you are building up gradually during preseason rather than jumping straight into high-volume throwing.
Listen to your body. Soreness in the bicep or deltoid after throwing is normal. Pain on the inside of the elbow or deep in the shoulder is not. If you feel sharp pain, stop throwing immediately and see a sports medicine professional. Pitching through pain is how careers end early.
How to Use Your Four Seam Fastball in Games
Having a great four seam fastball in the bullpen is one thing. Knowing how to use it in games is what separates pitchers who dominate from pitchers who just throw hard. Here is my approach to game planning with the four seamer:
Establish it early. In the first inning, show hitters your fastball up in the zone. Even if they foul it off or take it for a ball, you are planting a seed. They now know you can bring it up there, which opens up the bottom of the zone for your off-speed pitches later.
Elevated four seamers generate whiffs. MLB data consistently shows that four seam fastballs thrown at the top of the zone or above produce whiff rates of 30 percent or higher. The same pitch at the belt generates only about 15 percent whiffs. The four seamer is designed to be thrown up. If you are consistently throwing your four seam fastball down in the zone, you are playing to the pitch’s weakness.
Use it to set up your off-speed. The four seam fastball up paired with a curveball or changeup down creates a devastating pitch sequence. The vertical separation between a fastball at the letters and a curve at the knees can be 30 inches or more. Hitters cannot adjust their swing that much in the fraction of a second they have to decide.
Do not be afraid to throw it in hitter’s counts. A lot of young pitchers are taught to nibble with off-speed when they are behind in the count. But if your fastball has good velocity and ride, throwing it with conviction in a 2-1 or 3-1 count can be incredibly effective. Hitters are geared up to hit in those counts, and a well-located four seamer up and in can produce swings and misses or weak pop-ups.
Change speeds even within your fastball. You do not have to throw every four seamer at 100 percent effort. Throwing one at 90 percent and then coming back with one at maximum effort creates a subtle speed change that disrupts a hitter’s timing. A 3 mph difference between two fastballs is enough to be late on the harder one.
Building a Pitch Arsenal Around Your Fastball
Your four seam fastball should not live in isolation. It is most effective when paired with pitches that create contrast. Here is how I build pitch arsenals at different levels:
Youth pitchers (12 and under): Four seam fastball and a changeup. That is it. Do not throw breaking balls at this age. Master command of your fastball and learn to take speed off with the changeup while maintaining the same arm speed. If you can locate a four seamer and throw a quality changeup at 12 years old, you will dominate.
Middle school and early high school (13 to 15): Four seam fastball, changeup, and begin introducing a curveball. The curveball should be taught with proper curveball grip mechanics by a qualified coach, not by twisting your wrist.
High school upperclassmen (16 to 18): Four seam, changeup, curveball, and optionally a slider or cutter. At this level, having three quality pitches is more important than having five mediocre ones. Your four seam fastball should still be your primary pitch 55 to 65 percent of the time.
College and beyond: A full arsenal that is built around the four seamer. Your secondary pitches exist to make your fastball better, and your fastball exists to make your secondaries better. The interplay between pitches is what creates deception and keeps hitters off balance.
Frequently Asked Questions
How fast should a four seam fastball be?
It depends on your age and level. Youth pitchers (10 to 12) typically throw 45 to 65 mph, high school pitchers 65 to 90 mph, college pitchers 85 to 95 mph, and professional pitchers average around 93.5 mph. Velocity is important, but command, spin rate, and how you use the pitch matter just as much.
What is the difference between a four seam and a two seam fastball grip?
The four seam grip places your index and middle fingers across the horseshoe seams, perpendicular to the seam direction. The two seam grip places your fingers along the narrow seams where they run close together. The four seam creates backspin and perceived rise. The two seam creates arm-side run and sink.
Can I throw a four seam fastball with small hands?
Yes. Pitchers with smaller hands may need to narrow their finger spacing slightly and choke up on the ball a bit more. The key principles — fingers on seams, ball off the palm, fingertip pressure — still apply regardless of hand size. Many successful MLB pitchers have average-sized or smaller hands.
How do I increase the spin rate on my four seam fastball?
Focus on finger strength and positioning. Your fingers should be directly behind the ball at release, pulling down on the seams. Wrist snap drills, weighted ball pulldowns, and strengthening your forearms and fingers with rice bucket exercises can all help. Some spin rate is genetic (related to finger length, grip strength, and wrist flexibility), but most pitchers can improve their spin efficiency through training.
Should I throw a four seam or two seam as my primary fastball?
If you have a higher spin rate (above 2,200 RPM at the high school level, above 2,300 at college), the four seam is likely your better option because you can generate ride. If you naturally have a lower spin rate and generate good arm-side movement, a two seam or sinker might be more effective as your primary fastball. If you have access to a radar gun with spin rate tracking or a Rapsodo unit, test both and see which one produces better results.
How many four seam fastballs should I throw in a game?
At the MLB level, starters throw their four seam fastball about 35 to 50 percent of the time. At the youth and high school level, I recommend 55 to 65 percent four seamers because command of the fastball is the most important skill to develop. As you add more pitches and gain confidence in your secondaries, you can reduce your four seam usage, but it should always remain your primary pitch.
Is a four seam fastball bad for your arm?
The four seam fastball actually produces less arm stress than most breaking balls when thrown with proper mechanics. Research from ASMI shows that the fastball generates lower elbow valgus stress than sliders and curveballs. The risk comes from throwing too many pitches total, not from the four seam fastball itself. Follow pitch count guidelines, maintain a solid stretching and arm care routine, and you will be fine.
What drills can I do at home to improve my four seam fastball?
Wrist snap drills into a net, towel drills for mechanics, medicine ball rotational throws, and grip work can all be done at home. You can also work on forearm and grip strength with rice bucket exercises, wrist curls, and finger squeezes. If you have a net and enough space, flat ground throwing with a focus on your four seam grip and release is the single best home practice routine. A quality training setup does not require a lot of space.
Putting It All Together
The four seam fastball is the pitch everything else revolves around. Get the grip right with your fingers across the horseshoe seams and the ball off your palm. Build velocity through your kinetic chain, not by muscling with your arm. Use drills like long toss, wrist snaps, and hip-lead throws to develop both velocity and command. And most importantly, take care of your arm so you can keep throwing for years.
Start with the grip. Practice it every day until you can find the four seam position in your glove without looking. Then work through the drills in this guide progressively, adding complexity as your mechanics improve. Track your velocity and command percentages so you have objective data to measure your progress.
Every dominant pitcher in baseball history has had a fastball that hitters respected. Whether you are throwing 60 mph in Little League or 95 in college, the principles are the same. Get the grip right, let your body do the work, and throw it with conviction. That is how you develop a four seam fastball that keeps hitters guessing and swinging late.
