#3 Roy Keane and Mick McCarthy
Roy Keane is known for his short temper and brash attitude. He fell out with Sir Alex Ferguson as well when he was at Manchester United. But he had the biggest fall out of his career with his national team manager Mick McCarthy just before the 2002 World Cup.
Keane wasn't happy with Ireland's preparations and training methods ahead of the 2002 World Cup, and had his feelings known to the manager. Both had an exchange of words, in which both men involved verbally abused each other. Subsequently Roy Keane was stripped of the captaincy, and sent home immediately from their camp in Asia.
Edited by Anthony Akatugba Jr.