Almost every serious youth throwing injury traces back to the same causes: pitching while fatigued (36× injury risk), too many pitches, too many innings, and not enough time off. Pitch type matters far less than parents fear — a 10-year study found no significant link between curveballs and injury. Manage the workload and you protect the arm.
Pitch count limits and required rest (MLB / USA Baseball Pitch Smart)
| Age | Max pitches/day | 0 days rest | 1 day | 2 days | 3 days | 4 days |
|---|---|---|---|---|---|---|
| 7–8 | 50 | 1–20 | 21–35 | 36–50 | — | — |
| 9–10 | 75 | 1–20 | 21–35 | 36–50 | 51–65 | 66–75 |
| 11–12 | 85 | 1–20 | 21–35 | 36–50 | 51–65 | 66–85 |
| 13–14 | 95 | 1–20 | 21–35 | 36–50 | 51–65 | 66–95 |
| 15–16 | 95 | 1–30 | 31–45 | 46–60 | 61–75 | 76–95 |
| 17–18 | 105 | 1–30 | 31–45 | 46–60 | 61–80 | 81–105 |
Read it as: pitches thrown today → days of rest required before pitching again. Counts follow the PLAYER across every team, league, tournament, and showcase — parents are the only ones positioned to enforce that.
The rest of the Pitch Smart rules
- No more than 100 innings pitched in any 12 months (over 100 → 3.5× injury risk).
- At least 4 months per year with no overhead throwing, 2–3 of them consecutive.
- Never pitch on 3 consecutive days, in multiple games the same day, or for multiple teams in the same season.
- Don't catch when not pitching — the pitcher-catcher combination nearly triples elbow/shoulder stress exposure.
- Never pitch with a tired or sore arm — this is the single biggest risk factor (36×). "One more inning" on a fatigued arm is where injuries happen.
- Breaking balls: earn them — a consistent fastball and changeup come first. Be cautious with off-season showcases, especially on a deconditioned arm.
- Play other sports. Multi-sport athletes get hurt less.
Warming up the right way
- Get hot first: jog until you break a light sweat, then dynamic stretching (leg swings, lunges, arm circles, trunk rotation) — save long static holds for after.
- Wake up the cuff: one set of 10 of your band routine (Thrower's Ten: external/internal rotation, scaption, rows).
- Throw your way up: easy throws from 30–45 feet, gradually lengthening and intensifying. Long-toss with a crow-hop; no maximum-effort throws until fully loose.
- Weighted balls? Velocity programs using them showed a 24% injury rate in one controlled trial (vs. zero in controls). They are a supervised training decision for mature athletes — not a warm-up tool, and not for developing arms.
Recovering like a pro
- Sleep is the best-proven recovery tool: adolescent athletes sleeping under 8 hours are ~1.7× more likely to be injured. Protect 8–10 hours.
- After an outing: light aerobic work (bike, jog) beats sitting; gentle stretching including the posterior shoulder (sleeper / cross-body stretch) after throwing — not before.
- Ice is fine for comfort but doesn't speed recovery — motion, sleep, and fueling do. Eat protein + carbs within a couple of hours of pitching.
- Build gradually: don't double your weekly throwing volume — sudden workload spikes after time off are when arms break down. Returning from a layoff? Use our 6-week Return-to-Throwing Program.
- Fuel it: see our Athletic Performance & Nutrition guide.
When to call us
Elbow or shoulder PAIN (not muscle soreness) during or after throwing, loss of velocity or control, pain that moves into the hand or causes numbness, or a growth-plate-age athlete with inner-elbow pain — stop throwing and get evaluated. Early evaluation routinely prevents season-ending injuries.
Sources: MLB/USA Baseball Pitch Smart guidelines (2026); Olsen et al. AJSM 2006; Fleisig et al. AJSM 2011; Milewski et al. J Pediatr Orthop 2014; Reinold weighted-ball RCT 2018; ASMI throwing guidelines. Education only — individual guidance from Dr. Pettit takes precedence.
Frequently asked questions
How many pitches can my child throw?
It depends on age — a 12-year-old caps at 85 pitches in a day, and pitch counts determine required rest days. The full Pitch Smart table is on this page; the counts follow the player across every team and tournament.
Are curveballs dangerous for young pitchers?
The evidence says workload matters far more than pitch type — a 10-year study found no significant curveball–injury link. That said, a consistent fastball and changeup should come first.
What is the single most important rule?
Never pitch with a tired arm. Pitching with arm fatigue carries a 36-times injury risk — it dwarfs every other factor.
Should my son use weighted balls?
Not as a warm-up, and with real caution overall — one controlled trial of a weighted-ball velocity program found a 24% injury rate versus zero in controls. They are a supervised training decision for mature athletes.
See Dr. Pettit
5 locations across Cincinnati & Northern Kentucky · (513) 354-3700