Mullings turned pro in 1993 and challenged Raúl Márquez for the IBF light middleweight title in 1997, but lost a split decision.
In Dec of 1997, Mullings shocked the world with a ninth-round TKO over WBC and lineal light middleweight champion Terry Norris.
After one defense, he lost the belt to Javier Castillejo in 1999 via majority decision in the opponent's hometown of Madrid.
[1] Later that year he took on former Olympian David Reid for the WBA light middleweight title, but lost a decision.
Mullings had been working as a trainer in Peekskill, NY, prior to his death, at age 53.