Boston, MA (My Sportsbook) - Houston Astros pitcher Roy Oswalt is expected to miss a turn in the rotation because of a groin injury he aggravated on Wednesday against the New York Yankees.

Oswalt left that contest in the second inning and the Houston bullpen went on to complete the first six-pitcher no-hitter in baseball history in an 8-0 victory.

The Astros, in Boston for a series against the Red Sox, said Oswalt is day-to- day.

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, 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.

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

In 12 starts this season, Oswalt is 4-4 with a 3.05 earned run average.

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