Manager Fredi Gonzalez said Tuesday that Hanson will miss the first two days of spring training, then gradually work his way back into a normal routine. If there are no setbacks, he should be back at full strength within a week.
Hanson blew out a tire Monday near the Braves' Disney World complex and may have bumped his head on either the windshield or the steering wheel. The right-hander was diagnosed with a Grade 1 concussion but apparently has no other injuries.
Hanson is expected to be one of the team's top starters in 2012. He was 11-7 with a 3.60 ERA last season despite a shoulder injury.