Clay Buchholz didn't take part in a scheduled bullpen season on Saturday afternoon, leaving his scheduled start on Tuesday in jeopardy.
"Obviously, right now, he's not going to start on Tuesday," John Farrell said. "Basically what we're doing is going as tolerated with throwing. It's likely at some point we're going to have to get him out on a rehab assignment and at least one start for now."
Buchholz has been on the disabled list retroactive to June 9 with a strained trapezius muscle in his neck.