Sports Medicine with the Cubs’ Mark O’Neal

Cubs’ director of medical administration Mark O’Neal explains what a “dead arm” is and emphasizes the importance of stretching in sports.


Chicago Cubs head trainer Mark O’Neal escorts Chicago Cubs second baseman Darwin Barney off the field after he was hit by a pitch to his head during the eighth inning of their game at Wrigley Field, in Chicago, on Tuesday, July 31, 2012. (Nuccio DiNuzzo/ Chicago Tribune)


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