Manager John Schneider said Yesavage (knee) will throw his first bullpen Friday, Hazel Mae of Sportsnet reports.
Yesavage has been throwing off flat ground, but he is about ready to take the next step in his recovery. When he has his bullpen session Friday, it will be about three weeks since he had surgery Aug. 11 to repair his torn meniscus. The right-hander is eyeing a return before the end of the season.