Date of Birth: 
About Gary O'Sullivan
- Gary "Spike" O'Sullivan (born 14 July 1984) is an Irish professional boxer who has formerly held the WBO International middleweight title.
- He has also acted and has performed stunts in the 2007 film Strength and Honour.
- O'Sullivan is promoted by Murphy's Boxing, a boxing promotion founded by Ken Casey of the Boston punk band Dropkick Murphys and also by Golden Boy, a promotion founded by boxing legend by Oscar de la Hoya.
- He is trained and managed by Paschal Collins, of the Celtic Warrior Gym in Dublin.
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