Re: Does strength or leverage determine the distance one can throw a baseball?

You may have some luck if you can find a couple of books: The Physics of
Baseball by
Addair or The Physics of Sports editted by Armenti. 
Another good source is one the many books on baseball training.  Mel Stottlemyre
has written a few books on pitching mechanics.
 
The key elements to throwing for distance or speed are:
arm length at point of throw, the power transferred from thrower to ball, and
the air resistance.

Simply stated the arm length at the time of throw determines the initial
velocity of the ball at release.  The power transferred from the thrower to the
ball is a function of the wind-up and recruitment of the larger muscles of the
back and legs by rocking and then stepping into the throw.  And finally the air
resistance can be important once the ball is thrown.  A nice tail wind versus a
frustrating head wind can make a big difference.

Sincerely,

Tom "Mud Cat" Cull