Nats outfielder Pena to have surgery on left shoulder

WASHINGTON -- Washington Nationals outfielder Wily Mo Pena will have surgery on his left shoulder.

Pena has a small tear in his left rotator cuff and fraying of the labrum in his left shoulder.

He was examined Monday by Nationals team doctor Ben Shaffer and is expected to have the operation within seven to 10 days.

Pena is hitting .205 with two homers and 10 RBIs in 195 at-bats this season for the Nationals, who enter the All-Star break at 36-60, the worst record in the majors.