My son has a buckle fracture of his left thumb can he do more damage to it if he plays baseball?

LEFT THUMB FX: As long as the thumb has splint and well bandaged it is well protected and cannot be affected by playing baseball.

Dent fracture: The buckle is basically a dent or irregularity in the bone surface.It is painfull but does not reduce the integraty or strength of the bone significantly.These do not have to maintain a strict allignment because they are not out of allignment.Splinting is for comfort.Other than aggravating the pain, playing should have no negative effect.