NEW YORK — Delmon Young doubled home the go-ahead run in the 12th inning after New York's Raul Ibanez hit another stunning game-tying home run during a four-run rally in the ninth, and the Detroit Tigers outlasted the Yankees 6-4 Saturday night in an AL championship series opener in which Derek Jeter was helped off the field with what appeared to be a serious leg injury. Jeter rolled over his knee when he dove in an attempt to glove Jhonny Peralta's grounder up the middle in the 12th. Unable to move, he flipped the ball toward the mound and his leg was dangling as he was assisted off by manager Joe Girardi and trainer Steve Donahue.