Plenty of baseball coaches will claim that they can increase velocity and help you prevent or get rid of arm pain. The problem is this: many coaches aren't arm mechanics experts. Randy Sullivan, M.P.T., C.S.C.S. is an arm mechanics and arm pain expert who takes a new approach to increasing velocity and eliminating arm pain. What else? He guarantees that he can teach any able bodied grown boy/man to throw 90 mph or more. What he doesn't guarantee is how long it will take to happen...because every player achieves his goals at a different speed. The imporant thing is that, if they follow the program, they all get there!