Before gaining prominence in WWE, Lesnar was an accomplished amateur wrestler, and won the 2000 NCAA wrestling championship. In WWE, Lesnar was the 2002 King of the Ring, and won the 2003 Royal Rumble. He is also a three-time WWE Champion, and is the second youngest WWE Champion in history.
After leaving WWE in 2004, Lesnar pursued a career in the NFL. He played for the Minnesota Vikings, before being cut from the team for no-showing at practices due to injuries.
Lesnar returned to professional wrestling at the end of 2005, and joined New Japan Pro Wrestling, where he won the IWGP Heavyweight Championship in his first wrestling match since leaving the WWE. He was stripped of the title in July 2005, although he held the physical belt until June 2007.
Lesnar started a career in Mixed Martial Arts, and had his first match, in June 2007. He has since signed with Ultimate Fighting Championship and faught Frank Mir, losing via kneebar. He then faught Heath Herring and beat him via decision. Brock Lesnar is about 6'2'' and 265lbs. Pure muscle. He is a beast.