21.   But he had tweaked his left hamstring while running Saturday, and he appeared to tire in the third.

22.   But he sprained his left wrist in April and missed seven games, then pulled his left hamstring a month later and missed seven more games.

23.   But over the next three seasons, he missed a total of seven games because of injury, including five last season because of a strained left hamstring.

24.   But Saturday, he toyed with a lineup that was missing Nomar Garciaparra, out with a pulled left hamstring.

25.   But she stopped midway through her semifinal with a left hamstring tear and did not finish the race.

26.   But three weeks ago Ramirez hurt his left hamstring going for a fly ball in Fort Myers.

27.   Cardinals left fielder Matt Howard left the game in the third inning with a strained left hamstring.

28.   Catcher Mike Piazza missed the past two games with a strained left hamstring.

29.   Chris Gatling, the high-scoring sixth man, did not practice Friday because of a sore left hamstring.

30.   Clemens is eligible to do that Thursday, but indications are he may take a few extra days to make sure his left hamstring is sound.