Bill Duff (born February 24, 1974) is a former National Football League, NFL Europe, and Arena Football League defensive tackle, and host of Human Weapon on the History Channel.
[1][2] He holds a brown belt in Tang Soo Do, a Korean martial art he refers to as "Korean Street Fighting".
[7][8][9] He played for the Cleveland Browns in their expansion year.
[10][11][12] He started for the Orlando Rage in the XFL and played in 2002 for the Berlin Thunder of NFL Europe.
[13] He later played in the Arena Football League for the Indiana Firebirds and Columbus Destroyers.