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#5 Evander Holyfield
Evander Holyfield's career as a professional boxer spanned over two decades, during which he became the only fighter in history to win the undisputed championship in cruiserweight as well as in the heavyweight division. Holyfield also has an Olympic bronze medal to his list of accomplishments. However, his most notable matches have to be the two fights against the Iron Mike Tyson, who he defeated on both occasions.
In 2007, Holyfield showed up at an edition of WWE Saturday Night's Main Event and took on the former ECW World Champion Matt Hardy in a boxing match. Before his fight with Hardy, The Real Deal knocked out MVP to showcase the WWE Universe what he was capable of doing inside the ring.
Evander Holyfield would later appear backstage on SmackDown last year where he talked about his love for pro-wrestling and WWE. You can check the interview here:
#4 Butterbean
Eric Esch, professionally known as Butterbean, was a prominent figure in the combat sports circle in the 90s. He had multiple appearances in WWE during that time and performed at the grandest stage of sports entertainment, WrestleMania, as well.
The heavyweight boxer was first seen in WWE at the D-Generation X: In Your House event, where he had a boxing encounter with Marc Mero. His fight with the former Golden Gloves champion was scripted but the next time he appeared, he worked a proper boxing match inside the WWE ring.
At WrestleMania XV, Butterbean fought the WWE Brawl for All Champion Bart Gunn in a legit shoot fight and knocked him out within 34 seconds. Although Esch hasn't worked with WWE since then, he has appeared in numerous independent wrestling shows over the years.
