OK, maybe Brock Lesnar has some competition for the title of the meanest fighter in MMA history in Tank Abbott.
Billed as a pit fighter who benched pressed over 600 pounds and had over 200 street fights, Abbott was tailor-made for combat sports. He had the look of a badass biker and the attitude to back it up, but this was no act for Abbott. He loved being the bad guy.
Tank made his debut at UFC 6. He competed three times on that night, but it only took him 20 seconds to knock out John Matua in his first bout. What Abbott did next earned him a spot on this list.
As his opponent lay on the canvas with his eyes rolled in the back of his head and the doctors hovering over him, Abbott would mock Matua’s convulsions and let out a sinister laugh, thus setting the stage for one of the meanest men the sport has ever seen.