Brock Edward Lesnar is an American professional wrestler and former mixed martial artist, amateur wrestler, and professional American football player. As a professional wrestler, he is currently signed to WWE, where in storyline, he is designated a "free agent", allowing him to appear on both the Raw and SmackDown brands; however, as of August 2023, he is on hiatus. Often regarded as one of the most prolific combat sport athletes in the world, 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).

Professional wrestling is a form of athletic theater that combines mock combat with drama, under the premise that the performers are competitive wrestlers. Although it entails elements of sports wrestling and martial arts, including genuine displays of athleticism and physicality before a live audience, professional wrestling is distinguished by its scripted outcomes and emphasis on entertainment and showmanship. The staged nature of matches is an open secret, with both wrestlers and spectators nonetheless maintaining the pretense that performances are bona fide competitions; this is likened to the suspension of disbelief employed when engaging with fiction.