Bronx, NY (My Sportsbook) - Houston Astros pitcher Roy Oswalt aggravated a groin injury during his start against the New York Yankees on Wednesday night, but the bullpen picked him up and completed the first six-pitcher no-hitter in baseball history in an 8-0 victory.

Oswalt, who spent 15 days on the disabled list in May because of the problem, left the game in the second inning while pitching to Jorge Posada. The righthander worked one perfect inning with two strikeouts before exiting.

Pete Munro took over and threw 2 2/3 innings with three walks. Kirk Saarloos retired all four batters he faced and Brad Lidge (4-0), who was credited with the victory, tossed two perfect innings with a pair of strikeouts.

Octavio Dotel then struck out four in the eighth, as Alfonso Soriano reached on a wild pitch after fanning, and Billy Wagner worked a 1-2-3 ninth to finish it up.

It was the first Houston no-hitter since the late Darryl Kile beat the New York Mets on September 8, 1993. It also set a record for the most pitchers used in a no-hitter, topping the previous mark of four.

"One guy usually goes out there and does it," said Astros manager Jimy Williams. "Maybe two, but not six."

This was also the second no-hitter of the season, as Philadelphia's Kevin Millwood tossed one on April 27 against San Francisco.

Oswalt was making his third start since being activated off the disabled list on May 31. He had thrown seven innings in each start since coming off the DL, allowing just one run on 13 hits.

In 12 starts this season, Oswalt is 4-4 with a 3.15 earned run average.

Oswalt initially strained his groin while running the bases in a May 15 game against Pittsburgh. He slipped on second base after hitting a double.