Derek Warren Isaman (born April 23, 1967) is a former professional American boxer.
Isaman was played college football at Ohio State University. He was the starting inside linebacker for Ohio State Buckeyes.
Isaman was the 1988 National Golden Gloves Heavyweight champion. He also lost a points decision to Mike Tyson in a prior National Golden Gloves semi-final.
Isaman turned pro in 1990 and won his first 12 fights, before losing a rematch to Marion Wilson in 1992. He retired in 1994 after a three fight win streak.