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.
Oswalt Roughed Up In Phillies Debut