When Mariano Rivera decides to retire, he expects the decision to be final. Rivera saw teammate Andy Pettitte come out of retirement and re-sign with the Yankees on Friday. "I know that I want to make the right decision," Rivera said. "That's what I want to do. When I make the right decision, I don't want to come back or say, 'I should have done it' or 'I should have stayed.' I want to be one thousand percent sure that it's the right decision." Rivera, 42, has been hinting at retirement all spring and repeated that he is still secure in the decision that he reached before reporting to Spring Training.