Jul 31, 2010 9:38 AM EST

Roy Oswalt struggled in his debut with the Phillies on Friday night.

Washington defeated Philadelphia 8-1, ending the team's eight-game win streak.

"I came out amped up, held the ball a little tight," said Oswalt. "Didn't really start feeling better until the last two innings. Didn't really go my way."

Oswalt allowed five runs -- four earned -- and seven hits in six innings.

Via ESPN