"We might have to back him off," Bochy said, not intending any sort of pun. Ominously, Peavy said his next start had not been scheduled.
Asked if Peavy had experienced a setback, Bochy replied, "I guess you could [say that]," though he quickly added the problem wasn't serious.
Bochy said he planned on meeting with Peavy, team physicians and head athletic trainer Dave Groeschner after Friday's batting practice to discuss the 14-year veteran's condition. Peavy threw 70 pitches Wednesday in a Minor League injury rehabilitation start with Triple-A Sacramento, allowing six runs and nine hits in 4 2/3 innings. It was his second rehab outing.
With replacement starters Chris Heston (5-3, 3.82 ERA) and Ryan Vogelsong (4-2, 4.24) performing effectively, the Giants have the freedom to "slow-play," in Bochy's words, the recoveries of Peavy and Matt Cain (strained flexor tendon).
As Peavy acknowledged, "That's the beautiful thing about this. We don't have to rush this. ... I want to make sure that I'm 100 percent healthy."
Peavy admitted he needed to strengthen himself considerably -- particularly his legs, which are a must for every pitcher. Until Thursday, he said, "I haven't been able to do a workout that wasn't a therapy session kind of thing."
Peavy, who won six of his final seven regular-season decisions for the Giants last year after being acquired from Boston at the Trade Deadline, signed a two-year, $24 million contract last December.
• Right-hander Erik Cordier, prevented for much of the year from unleashing his triple-digit velocity due to a forearm strain, declined the Giants' assignment to Triple-A but re-signed with the organization after declaring free agency.
Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, follow him on Twitter at @sfgiantsbeat and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.