Marcus L. Webb (born May 9, 1970 in Montgomery, Alabama) is a retired American professional basketball player. Webb played at Sidney Lanier High School, and collegiately at the University of Alabama and was selected with the 28th overall selection in the 1992 CBA Draft. He played nine games with the NBA's Boston Celtics during the 1992-93 season, averaging 4.3 points and 1.1 rebounds per game. He last played professionally in Argentina in 2005.