 He had problems with his right hand during his early amateur days and this made him depend more on his left hand.He had large reserves of stamina due to an abnormally slow heart rate, known as bradycardia, and he would use his left jab to score points whilst using his mobility to keep away from his opponent’s punches.This did not always lead to an attractive contest earning him the nickname the one armed bandit, and Cullen was not as popular outside his native North-East as his talent would seem to merit.