Stephen Collins (born 21 July 1964) is an Irish former professional boxer who competed from 1986 to 1997. Known as the Celtic Warrior, Collins is the most successful Irish boxer in recent professional boxing history, having held the World Boxing Organization (WBO) middleweight and super-middleweight titles simultaneously and never losing a fight as champion.

In 1990, Collins stepped in as a substitute in a World Boxing Association (WBA) middleweight title fight after Michael Watson was injured in training, and fought 12 rounds against Mike McCallum in Boston in 1990. Collins was supported by a large crowd of Irish Americans as he battled the champion McCallum, with the fight being close early on before McCallum started to tire as Collins gained momentum in the later stages to bring a close finish at the end of 12 exciting rounds. McCallum got the win by unanimous decision.

Michael Watson (born 15 March 1965) is a British former professional boxer who competed from 1984 to 1991. He held the Commonwealth middleweight title from 1989 to 1991, and challenged three times for a world title between 1990 and 1991. Watson's career was cut short as a result of near-fatal injury sustained during a loss to Chris Eubank for the World Boxing Organization (WBO) super-middleweight title in 1991.

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