WASHINGTON - Washington Nationals right fielder Jayson Werth broke his left wrist Sunday night trying to make a sliding catch against the Phillies.

"It's a clean break," Washington manager Davey Johnson said after the Nationals' 9-3 loss. "He's going to be out for a while."

Johnson said Werth will see a specialist to evaluate the injury.

Werth was injured in the sixth inning. The right fielder's glove got caught underneath him, and he bent his wrist backward trying to grab Placido Polanco's sinking liner. Werth stayed on the ground briefly before throwing the ball back to the infield. He walked off holding his left wrist.

Werth wasn't available to speak to the media after the game.

This is only the latest in a string of injuries that have already hit the Nationals this season. Michael Morse, slated to be the team's cleanup hitter, hasn't played because of an injured back muscle. Third baseman Ryan Zimmerman has been on the disabled list with a shoulder injury, and fill-in cleanup hitter Adam LaRoche has missed the last four games because of a sore right side muscle.

Werth missed the entire 2006 season after an injury to his left wrist that placed his career in jeopardy. He broke the wrist in spring training 2005 with the Dodgers and played 102 games that season before undergoing surgery to repair a torn ligament in the wrist.