Mariano Rivera could pitch for the Yankees again this season, according to the reliever's rehab doctor. Yankees general manager Brian Cashman said as recently as this week that "in terms of 2012, he's out." Dr. Keith Pyne made it clear on several occasions in a phone conversation with The New York Post that the ultimate authorities on when Rivera will return are his surgeon, Dr. David Altchek, the Yankees and Rivera himself. He said the working theory is, "Right now, he's shut down until next year." The key words in that reply were "right now." In a conversation Monday, Pyne also said Rivera is "working his butt off," is well ahead of schedule in rehab and "is itching to get back." He added, that Rivera "will be in the best position to accomplish that goal [pitching this year]. He's got everything it takes to accomplish that. ... If I was putting money on it, I would put my money on Mo."