Curveball “Age” Is the Wrong Question (Here’s the Judgement)
Most families want a number. But safety usually hinges more on readiness, mechanics quality, and workload density than on one birthday.
A calmer reframe:
Instead of “Is he old enough?” ask “Is his body ready for more complicated stress?”
Instead of “Is he old enough?” ask “Is his body ready for more complicated stress?”
What people get wrong
They assume the curveball is the problem. Often the real driver is the environment around it:
- trying to spin harder to “make it move”
- chasing strikeouts when fatigue is already present
- adding a new pitch on top of a packed throwing calendar
- using the wrist/forearm to create movement instead of a clean throw
The judgement model
- Readiness: Warm-ups smooth? Arm feels free? No “pinch” or heaviness?
- Movement efficiency: Can he throw fastballs with stable trunk/tempo late, not just early?
- Workload margin: Is there room to add learning reps without stealing recovery?
- Recovery trend: Soreness trending down week to week, not up?
If the body is inconsistent, a new pitch usually reveals it faster.
