Nicknamed The Matrix, he won the middleweight bronze medal at the 2004 Summer Olympics.
He was a standout amateur who won the National Amateur Championship in Middleweight.
His is a southpaw who is also a "switch hitter".
His younger brother Anthony Dirrell also won the National Amateur Championshiop in 2004 and 2005.
He and Evander Holyfield both won bronze medals at the Olympic games.