Pitching is the most-injured action in youth sports. The elbow takes load that nothing else in a kid’s life puts on it. The fix is simple, and almost no one follows it: count pitches, take real rest days, and do not throw a curveball before the body is ready.
Pitch counts are not a guideline. They are the rule, set by Little League International and reinforced by USA Baseball’s Pitch Smart program. The numbers depend on age. A 10-year-old’s daily max is 75 pitches with four days of rest required after a 51-pitch outing. A 13-year-old’s daily max is 95 with four days of rest after 66. The full table is on the Pitch Smart and Little League pages linked below. Print it. Tape it to the dugout fence.
The danger isn’t the single Saturday game where your kid throws 80. The danger is the kid who pitched 60 on Tuesday at school, 40 on Thursday in private lessons, and now wants to start Saturday for travel. No one is counting the total. The arm doesn’t know which uniform you are wearing.
The rest day rule is real. Days of rest required after an outing scale with the pitch count. After 51-65 pitches at age 11-12, the requirement is four calendar days. After 66+, it’s four days. There is no shortcut. Two outings in a weekend on the same arm is the move that gets your kid into a sports medicine clinic.
No curveballs before 14. This one is debated, but the position statement from the American Sports Medicine Institute is clear. Curveballs add torque to a growing elbow that hasn’t fused. ASMI recommends no breaking pitches until ages 14-15. Some kids develop earlier; talk to your pediatrician about your kid’s specific maturation. Until then, fastball and changeup. The changeup is plenty.
Off-season throwing is not the same as no throwing. Two to three months a year fully off from competitive pitching is the recommendation. Off does not mean don’t pick up a ball. It means no game pitching, no max-effort bullpens, no private pitching lessons that involve mound work. Light throwing and arm-care band routines are fine.
The signs to watch for. Pain that lingers more than 24 hours after throwing. Loss of velocity that doesn’t recover with rest. A pitcher who used to locate now suddenly can’t. Pain when the arm is fully extended. Any of those mean a doctor visit before the next outing, not after.
The honest part: a lot of the youth UCL injuries that show up as Tommy John surgeries at 17 had earlier warning signals that got missed or dismissed. The kid says it’s fine. The coach wants to win the bracket. The parent wants the kid to get the recruiting look. Following the pitch counts and rest days doesn’t guarantee a healthy arm; ignoring them is associated with materially higher injury rates in the published research. Both things are true.
Last updated May 2026.