Mariano Rivera has made up his mind regarding his future beyond the 2013 season … but he isn’t telling anyone. “Yes, I have (made a decision) … But I won’t give it up until I’m ready,” said Mo to Jack Curry. Rivera, 43, did say he will made an announcement before Opening Day. I think most of us have assumed it will be his final year, and a pre-Opening Day announcement reinforces that a bit. I don’t think Rivera would commit to playing in 2014 without first seeing how 2013 went.