GLENDALE, Ariz. >> Clayton Kershaw's back no longer pains him. Questions about his back, however, do."Yeah, all good," he said dismissively Saturday when the inevitable question came up after his first outing of the spring.Kershaw threw 12 pitches to retire the three batters he faced, striking out one of the Chicago White Sox, then he went to the bullpen to throw the equivalent of another inning.