Ray (elbow) will throw five innings in a rehab start with Triple-A Sacramento on Friday, Maria I. Guardado of MLB.com reports.
Friday's outing is likely Ray's final rehab start before being reinstated from the injured list. If that's the case, the veteran southpaw could pitch during a four-game road series against the Dodgers early next week. Hayden Birdsong is the most likely candidate to lose their rotation spot once Ray is activated, although the team could opt to use a six-man rotation temporarily considering the Giants have a stretch of 11 games in 10 days coming out of the All-Star break.