Roger Clemens threw six strong innings before giving up a pair of one-out walks in the seventh and the Tigers made him pay for it. Craig Monroe hit an RBI double off reliever Dan Wheeler in the three-run seventh and Nate Robertson threw seven scoreless innings to give Detroit a 4-0 victory over the Astros on Tuesday night. In his second start this season, Clemens allowed two runs, one earned, and three hits with two walks in 6 1-3 innings. He struck out three consecutive batters over the fifth and sixth innings, but didn't fan another Tiger in his 84-pitch night. The seven-time Cy Young winner left the field angry, and wasn't in a much better mood in the clubhouse. Clemens did say he wasn't happy about being taken out of the game by Manager Phil Garner.