Original: Players who have played for both sides of the Old Firm include Alex Bennett, Scott Duncan, Robert Gordon Campbell, George Livingstone - these players played before the intensity of the rivalry had started/before 1912 - Alfie Conn, Maurice Johnston, Kenny Miller, Steven Pressley, Mark Brown and Barry Robson.
Simplified: The most recent players to do so are Kenny Miller, Maurice Johnston, Steven Pressley, Mark Brown and Barry Robson.