Raul Marquez fought as a light-middleweight at the 1992 Barcelona Olympics, losing in the quarter-finals. He came into Barcelona as a favorite, having won the 1991 World Amateur Championships, and had won a silver at the 1990 Goodwill Games. Marquez was US champion as a welterweight in 1989 and a light-middleweight in 1991.
After the 1992 Olympics, Marquez turned professional and won his first 25 bouts. In April 1997 he defeated Anthony Stephens by TKO to win the IBF light-middleweight title. He defended the title twice that year, but lost it by TKO in December 1997 to Luis RamÃ³n Campas. Marquez later fought for several titles unsuccessfully. He ended his professional career with a record of 69 wins (37 by KO), 4 losses, and 1 draw. Marquez became a color analyst for boxing matches on Spanish-language networks.