Phillies shortstop Jimmy Rollins has been placed on the disabled list with a strained calf for the second time this season. He re-injured his right calf on Friday night in Philadelphia's victory over Boston. Rollins missed 29 games with a strained right calf before rejoining the lineup Monday. "There's no sense in playing around with it. ... His legs have to be well," Phillies manager Charlie Manuel said. "He has to be 100 percent. We can't be knocked around waiting for him to play, on and off. He has to get 100 percent."