August 9, 2008; Minneapolis, MN, USA; Heavyweights Brock Lesnar (black trunks) and Heath Herring (black/yellow trunks) battle during their bout at the Target Center...

Brock Lesnar

Brock Lesnar before his win over Randy Couture for the UFC World Heavyweight mixed martial art championship match...

LAS VEGAS - JULY 11: UFC Heavyweights Brock Lesnar (L) battles Frank Mir during their heavyweight title bout during UFC 100 the Mandalay Bay Hotel...

Brock Lesnar before his win over Randy Couture for the UFC World Heavyweight mixed martial art championship match...

Randy Couture is tended to by doctors after losing his match against Brock Lesnar for the UFC World Heavyweight Mixed Martial Arts championship match on Saturday, Nov. 15, 2008 in...

Brock Lesnar and Kurt Angle (Photo by Theo Wargo/WireImage

Frank Mir vs. Brock Lesnar; Las Vegas; Mandalay Bay Events Center; Mixed Martial Arts; MMA; Nevada; UFC; UFC 100; Ultimate Fighting...

LAS VEGAS - NOVEMBER 15: Brock Lesnar before his fight against Randy Couture at UFC 91: Couture vs. Lesnar at the MGM Garden...

Brock Lesnar will be picking on someone his own size when he meets Shane Carwin, above

LAS VEGAS - JULY 11: UFC heavyweights Brock Lesnar (R) battles Frank Mir (L) during their heavyweight title bout during UFC 100 the Mandalay Bay...

...LAS VEGAS - NOVEMBER 15: Randy Couture (R) punches Brock Lesnar at the UFC 91: Couture vs. Lesnar at the MGM Garden Arena on November 15, 2008...

LAS VEGAS - NOVEMBER 15: UFC fighter Brock Lesnar speaks after defeating UFC fighter Randy Couture at the UFC 91: post fight press conference at...

ZOOM Gallery: UFC 100

Hi-resolution photo gallery of UFC 100

LAS VEGAS - NOVEMBER 15: Randy Couture lies on the canvas after having been knocked out by Brock Lesnar at the UFC 91: Couture v Lesnar at the MGM Garden Arena on November 15, 2008...