Twins closer Joe Nathan will miss the World Baseball Classic because of shoulder soreness. The specific discomfort is in the AC joint, which is where collarbone and clavicle meet at the top of the shoulder. "It wouldn't be fair for me to say I'm 100 percent and go play for Team USA when I'm not," Nathan said. "It wouldn't be fair for the Twins or Team USA. As hard as it is to have to watch this [event] and know I want to be there, at the same time I know this is the right decision to make sure I'm ready for April 6 [Opening Day]."