Twins catcher Joe Mauer reported to spring training on Sunday without a contract extension in place. He hasn't talked specifics about a potential deal all winter and he doesn't plan to change that now. "I'm not going to get into that," the reigning AL MVP said. "It would just open up a can of worms." Mauer is entering the final year of his deal and Minnesota is trying to get a long-term extension done before the regular season begins.