Yankees second baseman Robinson Cano was placed on the 15-day disabled list Tuesday with a strained left hamstring. Cano, the leading vote getter at his position for the AL All-Star team, was put on the DL retroactive to Monday. New York called up infielder Nick Green from Triple-A Columbus to take his roster spot. "He had an MRI and something showed up that we didn't like," said Yankees manager Joe Torre.