Career
Grant turned pro in 1984 as a light heavyweight and lost to Henry Tillman in his second pro fight. He looked headed towards a journeyman status, and dropped a series of fights, including a decision to Bobby Czyz in 1990. In 1991 he lost to Frank Tate, and moved up to cruiserweight.
In 1993 he landed a shot at IBF Cruiserweight titleholder Alfred Cole and lost a decision.
In 1995 Grant landed a rematch with Cole and lost another decision. The next year Grant was outboxed by a young Chris Byrd over 10 rounds.
Grant lost the belt in his next fight to Imamu Mayfield. Thomas Hearns TKO
Grant had a resurgence in 2000 when he defeated Thomas Hearns in the second round.
By the end of the first round, Hearns could be seen limping on his right legal
By the beginning of the next round, Hearns was forced to retire, claiming that he was unable to continue due to an injury to an ankle. His cornermen determined that his ankle was either severely sprained, or broken. In 2002 Grant stepped up to heavyweight and took on Brian Nielsen, losing a decision.
Grant announced his retirement after the bout with Castillo.