Brock Lesnar is a wrestler.
Brock Edward Lesnar ( [ ˈlɛznər ] born July 12 , 1977 ) is an American professional wrestler and former mixed martial artist , amateur wrestler , and professional American football player . After a contractual dispute with NJPW , he also wrestled as IWGP Heavyweight Champion in the Inoki Genome Federation ( IGF ) . The IWGP Heavyweight Championship was a professional wrestling heavyweight championship used by the Inoki Genome Federation ( IGF ) promotion .