He's nothing if not consistent. Mark Prior, the Second-Most Injured Man in Baseball™ (behind Ken Griffey Jr. and just ahead of teammate Kerry Wood), is done for the season due to injury.
Technically, it was a surgical procedure to repair his injured right shoulder that put Prior down for the count, but let's not split hairs. The important issue is trying to figure out if this is the season that Mark Prior will finally reveal to Chicago Cubs fans that his entire career has been a hilarious prank, and he was never actually a pitcher to begin with. The laughter will bring much-needed relief.