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The gang asks Cubs’ director of medical administration Mark O’Neal about the differences in strains, development, and nutrition for rookie players.
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)