Alfredo Aceves is a candidate to take Daisuke Matsuzaka's spot in the rotation.
Matsuzaka was drilled for five runs in 1 1/3 innings Saturday and has allowed 11 runs over five frames in his last two starts. Aceves was the Red Sox' closer just a few weeks ago, but the rubber-armed right-hander has been stretched out in his last few outings and has past starting experience.