Mariano Rivera knows whether or not he'll retire at the end of the season, but he won't reveal his plans. "I know now," the longtime Yankees closer said. "I just don't want to tell you. I know now. I will let you guys know when I think I should tell you." Rivera broke the all-time saves record in 2011 and will earn $17 million this season in the final year of his contract. He would like to leave before his skills deteriorate. "I don't want to be seen like that," Rivera said. "It is important for me to leave the game on top if God allows me to do that, just finish on top, knowing I did what I was called to do."