PHILADELPHIA (Reuters) - The Philadelphia Phillies put three-time All-Star shortstop Jimmy Rollins on the 15-day disabled list with a groin injury, Major League Baseball's first-place team said on Monday.

Rollins, 32, suffered a right groin strain during Sunday's loss to the Washington Nationals but it was not clear during which play the injury occurred.

The Phillies activated third baseman Placido Polanco, who had been on the disabled list since August 15 with a sports hernia, to fill Rollins's spot.

Rollins, a former National League most valuable player who has spent his entire major league career in Philadelphia, has a .268 batting average this season with 14 homers with 58 RBI.

(Writing by Steve Keating in Toronto; Editing by Frank Pingue)