- Associated Press - Tuesday, May 21, 2013

SAN FRANCISCO (AP) - Nationals reliever Ryan Mattheus has broken his pitching hand punching a locker in frustration following a rocky outing.

Washington manager Davey Johnson made the announcement after the Nationals’ 8-0 loss to the San Francisco Giants on Monday night, one day after Mattheus was injured. The right-hander allowed five runs in one inning of Washington’s 13-4 loss to San Diego on Sunday.

According to Johnson, Mattheus did not inform the team of his injury until just before Monday night’s game at AT&T Park. Johnson did not specify how long Mattheus would be sidelined, only that it will be “a while.”

The news came on the same night that the Giants lost starter Ryan Vogelsong to a broken pitching hand. He was injured while batting in the fifth inning.