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 .