Chicago Cubs manager Rick Renteria, left, watches pitcher Travis Wood throw during the team's first spring training baseball practice, Friday, Feb. 14, 2014, in Mesa, Ariz. (AP Photo/Matt York)
Chicago Cubs catcher Welington Castillo catches during the team's first spring training baseball practice, Friday, Feb. 14, 2014, in Mesa, Ariz. (AP Photo/Matt York)
Chicago Cubs catchers put on their gear during the team's first spring training baseball practice, Friday, Feb. 14, 2014, in Mesa, Ariz. (AP Photo/Matt York)
The Chicago Cubs pitchers and catchers stretch during the team's first spring training baseball practice, Friday, Feb. 14, 2014, in Mesa, Ariz. (AP Photo/Matt York)