Because of inflammation in the bursa sac of his right shoulder, the All-Star hasn't pitched since June 8. Even so, Buchholz is 9-0 with a 1.71 ERA in 12 starts.
"I think the first time out we're probably going to have him in that 45-50 pitch range. That would be the target," Farrell said. "With that being the case, the next start is going to have to be a progressive start from there so we're not overtaxing the bullpen when he returns."
While he didn't want to put a set number on how many rehab starts Buchholz will have to make, Farrell said Buchholz will have at least two before returning to the Red Sox.
Jacob Thorpe is an associate reporter for MLB.com.
This story was not subject to the approval of Major League Baseball or its clubs.