My last 3 responses have been this set of excercises to help pitchers. It's a great way to strengthen your arm,shoulder, back and rotator cuff. If you don't already do this it is a for sure must..it's my favorite thing to do and it has helped me so much. Also it can give you more velocity and greatly reduce injury (even the big leagues use this, so my PT said).
http://www.thecompletepitcher.com/pitching_workouts/tubing_program.swf
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