Mon 7/8/13 5:22 PM

Justin Maxwell (head) has passed all concussion tests and will begin a minor league rehab assignment Monday with Triple-A Oklahoma City. Maxwell landed on the 7-day concussion disabled list on June 30 after banging his head on the outfield grass while attempting a diving catch, but he's ready to return to game action. It's not clear when he'll rejoin the Astros.