A growth spurt can temporarily throw off a pitcher’s timing and control, stall his velocity until strength catches up, and leave his growth plates more vulnerable to overuse. It’s usually temporary, and many pitchers throw harder afterward. Track his height, keep the workload steady, avoid big mechanical changes, add mobility and strength work, and see a doctor for any elbow or shoulder pain.
He grew three inches since spring. His shoes don’t fit, his pants are too short, and suddenly the kid who pounded the strike zone can’t find it. Maybe his velocity dipped too, or his elbow has been sore.
Growth spurts are one of the most important, and most overlooked, stretches in a young pitcher’s development. Here is what a growth spurt does to a pitcher, why the arm needs extra care during one, and how to get through it without panicking about his numbers.
What a growth spurt does to a pitcher
| What changes | What you might see |
|---|---|
| Longer arms and legs | Timing and control come and go |
| Bones grow first | Tightness, less flexibility |
| Strength lags behind | Velocity stalls or dips |
| Growth plates | More vulnerable to overuse |
| Coordination | Looks gangly or awkward |
Most boys hit their fastest growth somewhere around 12 to 15, though every kid is on his own schedule. During that window, his body is literally a different size every few months, and his delivery has to keep adjusting to it.
Why control and velocity dip
A delivery is timing. When his arms and legs get longer, the timing he built at a smaller size doesn’t quite fit anymore. His stride lands in a slightly different spot, his release point moves, and the ball goes places it didn’t go last season. Bones also tend to grow faster than muscles and tendons can keep up, so he may feel tight and lose some flexibility for a while.
This is temporary. As his strength and coordination catch up to his new size, control usually comes back, and velocity often jumps past where it was. Our guides on sudden control problems and losing velocity cover the other possible causes.
“Awkward now often means stronger later.”
Compare him to himself, not to the kid on Instagram.Why the arm needs extra care
Growth plates are areas of growing cartilage near the ends of the bones, including around the elbow and shoulder. They’re the weak spot in a young pitcher’s arm, and during a growth spurt they can be even more vulnerable to overuse. That’s when conditions like Little League elbow and shoulder problems tend to show up.
That doesn’t mean he has to stop pitching. It means the workload rules matter more than ever: follow pitch limits and rest days, count every pitch across every team, and don’t pile on extra throwing to “fix” his control. Our free pitch count calculator shows the rest he needs after any outing. If his elbow or shoulder hurts, he stops throwing and you see a doctor. Never trade a healthy arm for a number.
How to get through it
Track his height
Mark it on a door frame every few months. Fast growth is your signal to be extra careful with workload and patient with results.
Keep the workload steady
No sudden spikes in innings, pitch counts, or new throwing programs while he’s growing fast.
Don’t overhaul his mechanics
A growth spurt is a bad time for big delivery changes. Small, simple cues only, and let his body settle.
Add mobility and strength
Light, regular mobility work and age-appropriate strength training help his body catch up to his new frame. See strength training for youth pitchers.
Film him every few months
Video shows how his delivery is changing as he grows, so you’re reacting to what’s really happening instead of a box score.
See how his delivery is handling the growth
Upload one video and we’ll break down his mechanics frame by frame: what’s changed, what’s working, and the one thing worth focusing on while he grows. Free. For any pain, always see a doctor first.
Start the Free Evaluation →Takes about 2 minutes · See a sample analysis firstWhat to tell him
A kid who suddenly can’t throw strikes often thinks he’s getting worse. Tell him the truth: his body is changing, his timing is catching up, and this happens to almost every pitcher who grows. Keep the pressure low and the expectations patient. Our guide on late bloomer pitchers is a good read for parents of kids who are still waiting on their growth, too.
The bottom line
A growth spurt can throw off a pitcher’s control, stall his velocity, and leave his growth plates more vulnerable for a while. It’s temporary, and many pitchers come out of it throwing harder than before. Track his height, keep the workload steady, skip big mechanical changes, add mobility and strength, and stop for a doctor if anything hurts. Little things now, big numbers later.
Common questions
Can a growth spurt affect pitching?
Yes. Longer limbs throw off timing, so control often comes and goes, and velocity can stall until strength catches up. It’s usually temporary.
Why did my son lose control after a growth spurt?
His delivery’s timing was built for a smaller body. As his arms and legs get longer, his stride and release point shift, and it takes time for his coordination to adjust. Patience and steady practice usually bring it back.
Is it safe to pitch during a growth spurt?
Usually, yes, with extra care. Growth plates can be more vulnerable to overuse during fast growth, so follow pitch limits and rest days closely, avoid workload spikes, and see a doctor for any elbow or shoulder pain.
Do pitchers throw harder after a growth spurt?
Often, once their strength and coordination catch up to their new size. That can take a few months or longer, and every pitcher is different.
At what age do boys have growth spurts?
Most boys have their fastest growth somewhere around 12 to 15, but timing varies a lot. Some start earlier and some much later.
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We'll show you exactly where his mechanics are costing him, and what to work on first.
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