Brock Lesnar is a wrestler.
Brock Lesnar . Lesnar won the then WWE Undisputed Championship five months after his main roster debut at the age of 25 , becoming the youngest champion in the title 's history . World Wrestling Entertainment , Inc. ( d/b/a WWE ) is an American publicly traded , privately controlled entertainment company that deals primarily in professional wrestling , with revenue also coming from film , music , video games , product licensing , and direct product sales .