Twins' catcher Joe Mauer recently had surgery to "eliminate a kidney obstruction," Twins' General Manager Bill Smith said. Smith stressed that Mauer's situation, "is not serious", and he is expected to be ready to go when Twins' pitchers and catchers report for duty on Feb. 14. "It's something he's had since he was a kid," Smith said. "It is something that has bothered him more lately. Everything went fine and he will be ready for the season."