Clemens (2-5) allowed five runs on nine hits and three walks and struck out three over four innings in a loss Tuesday to Boston.
Clemens hasn't managed to go more than five innings yet in 11 starts this season. He just hasn't shown good enough control to last deep into ballgames, as Tuesday's start marked the fifth time he was walked at least three batters. If he can't lower his 4.9 BB/9, he'll struggle to keep his rotation spot.