Buchholz had a lot going before going on the disabled list, making several mechanical adjustments in an attempt to break out of one of the worst slumps of his career.
Farrell was noncommittal when asked if Buchholz's rehab assignment will be more than one start. The righty is on the disabled list due to a hyperextended left knee.
"Yeah, we'll see how we get through Friday," Farrell said. "But it's not like he's coming off an arm ailment or anything with the throwing, the arm action. We feel like we can go from a three-inning sim game to five innings of work. We'll see where he's at after Friday."
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. This story was not subject to the approval of Major League Baseball or its clubs.