I'm sure this has been covered previously on a thread but here you go:
http://www.baseballstrength.or...hould-not-do-cardio/
Pitching is an explosive anaerobic action. I do understand getting loose and warming up but running just to be running for pitchers, not a fan. BTW, my son loves to run... almost to the point where he would have done track or CC but the seasons conflict with BB.