Brock Edward Lesnar ( LEZ-nər; born July 12, 1977) is an American retired professional wrestler, former mixed martial artist, amateur wrestler, and professional American football player. As a wrestler, he is best known for his numerous tenures in WWE between 2000 and 2026. Lesnar is the only person to have won the primary heavyweight championships of WWE, Ultimate Fighting Championship (UFC), New Japan Pro-Wrestling (NJPW), the Inoki Genome Federation (IGF), and the National Collegiate Athletic Association (NCAA). Lesnar competed in collegiate wrestling for the University of Minnesota, winning the NCAA Division I national championship in 2000. He soon signed with the World Wrestling Federation (WWF, renamed WWE in 2002), rising to industry prominence in mid-2002 by winning the WWE Championship at age 25, setting the record for the youngest performer to win the championship. In 2004, Lesnar departed WWE to join the Minnesota Vikings of the National Football League (NFL), but was cut from the team during pre-season. He returned to wrestling and signed with NJPW in 2005 where he won the IWGP Heavyweight Championship. Lesnar later departed NJPW and continued to be promoted as the IWGP Heavyweight Champion in the IGF before taking a hiatus from wrestling to pursue a career in mixed martial arts (MMA). Years later in 2012, he re-signed with WWE; his 504-day first reign with the now-defunct WWE Universal Championship is the seventh-longest world championship reign in the promotion's history and he had the most reigns with the title at three. He also won the Royal Rumble match twice (2003 and 2022), the Money in the Bank ladder match (2019), the King of the Ring tournament (2002), and ended The Undertaker's undefeated WrestleMania streak in 2014. He had his retirement match in the main event of Night 1 of SummerSlam in 2026. Lesnar began his MMA career for Hero's in 2007, and signed with the UFC in 2008. He quickly won the UFC Heavyweight Championship, but was sidelined with diverticulitis in 2009. On his return in 2010, Lesnar defeated Interim UFC Heavyweight Champion Shane Carwin to unify the heavyweight championships and become the undisputed UFC Heavyweight Champion. After two losses and further struggles with diverticulitis, Lesnar retired from MMA in 2011. He returned at UFC 200 in 2016 to defeat Mark Hunt, but his victory was overturned to a no-contest after he tested positive for a banned substance on UFC's anti-doping policy. He then retired from MMA for the second time in 2017. A box office sensation, he competed in some of the bestselling pay-per-view events in promotion history, including headlining UFC 91, UFC 100, UFC 116 and UFC 121. He also co-headlined UFC 200, briefly being the main headliner before that spot was given to Amanda Nunes vs. Miesha Tate.