A day after the right-hander's latest poor outing, manager Bobby Valentine indicated there's a possibility Alfredo Aceves could replace Dice-K in the rotation.
"I'm not sure," said Valentine. "We're going to have some meetings here with him, too. He was very disappointed yesterday, and so was I."
Since taking Aceves out of the closer's role a couple of weeks ago, the Red Sox have been gradually stretching him out with the idea he might get a chance to start.
Have a question about the Red Sox?
E-mail your query to MLB.com Red Sox beat reporter Ian Browne for possible inclusion in a future Inbox column. Letters may be edited for brevity, length and/or content.
What disappointed Valentine most about Matsuzaka's 1 1/3-inning performance on Saturday?
"I was disappointed he didn't come out in the second inning the way he threw in the first inning. There's got to be a way of replicating," Valentine said.
Many pitchers have come back strong from Tommy John surgery, so Valentine doesn't think health is the reason for Matsuzaka's struggles.
"I don't think it's related to the surgery," Valentine said.
Matsuzaka has made seven starts this season, going 1-5 with a 7.20 ERA.