During game 4 of the World Series, Mariano Rivera was shown holding a heating pad to his side or his ribs, in the bullpen. At the time, it was thought to be nothing and that he could just be keeping warm.

But, after the game last night, he admitted to an injury on ESPN, without going into a lot of detail. Check out the end of the video below. It sounds like he says that he "had some ribs going on; some injury that we don't want to talk about."