Brock Edward Lesnar / ˈlɛznər / ( born July 12 , 1977 ) is an American Canadian professional wrestler , mixed martial artist , and former amateur wrestler and professional American football player . He is currently signed to WWE on the Raw brand . He is a four @-@ time WWE ( World Heavyweight ) Champion , a former UFC Heavyweight Champion , and an NCAA Division I Heavyweight Wrestling Champion . He is also a one @-@ time IWGP Heavyweight Champion , making him a five @-@ time world champion in professional wrestling . As of July 14 , 2016 , he is # 8 in official UFC heavyweight rankings .