Mariano Rivera isn't going to let a season-ending knee injury end his Hall of Fame career. "I am coming back," the Yankees closer said on Friday afternoon. "Put it down. Write it down in big letters. I'm not going down like this. God willing and given the strength, I'm coming back." He tore the ACL and meniscus in his right knee while shagging fly balls prior to Thursday's game against the Royals, something he has done for two decades. Rivera, 42, said his decision was bolstered by a conversation Friday morning with Dr. David Altchek, the Mets team physician who performed surgery on his pitching shoulder after the 2008 season. "Dr. Altchek said I could be back in three, four, five months," Rivera said. "He said, 'You're a fast healer.' I will do my due diligence, my research. I will talk to whoever I have to. Yeah, it hurts me, I'm sorry that I let my teammates down, but at the same time, I'm positive. I'm positive. This is going to pass. This is going to pass."