Cain (forearm) is scheduled to make a rehab start for Double-A Richmond on Tuesday, Henry Schulman of the San Francisco Chronicle reports. Cain continues to rehab his injured forearm, completing an extended spring training start Wednesday without any reported issues. It's a welcome sign for the three-time All-Star, but a possible return date to the majors is still up in the air. While he figures to need a relatively lengthy stay in the minors, his 30-day rehab window will be up in early-to-mid July.