"Chase Utley will step up his rehab tonight, making his first official rehab start for Class A Clearwater. This is significant first, because it is his first affiliated game. Second, it will be his first action on back-to-back days. Utley played in extended spring training games on Saturday and Monday.

The move also means that the clock is started for his return to the Phillies. Players can only stay on rehab assignments for 20 days, meaning until May 29. Presumably, though, the clock could stop if he has a setback."