We've all had 24 hours to process the Mariano Rivera injury. The bottom line is: it sucks. It sucks for the Yankees. It sucks for the fans. It sucks for baseball. And it sucks for Rivera, who is as classy of a human being you can get in the sport. But now, with the ACL tear in his knee forcing him out for the rest of the 2012 season, it shifts David Robertson into the closer role.