i'll have to think about how best to explain it, but i agree with the answer. it makes sense. the best i can do on short notice is suggest you consider a figure skater spinning out on the ice. the closer they bring in their arms, the more quickly they spin. to slow their rotation at the end of their spin, they again spread their arms out wide. the reason we thing that a longer arm is going to yield a faster exit velocity is because we assume that both the short arm and the long arm will have the same rotational velocity. in that case, the velocity of the ball on exit would be, for the most part, w x r, or rotational velocity times radius, and the difference in the radius would correspond directly to an increased velocity. what mike marshall is telling us is that the shorter armed guy will, for the same amount of force, have a higher radial velocity, and i take it that the difference in radial velocity is enough to overcome the advantage the longer pitcher has in radius. not knowing and not being presented with the moments of inertia, radial distances, and rotational velocities, i can't check the math. but it can make sense to me.