21-111 of 11John Giamundo/WWE via Getty ImagesThe most unforgettable moment of Lesnar's career came at WrestleMania 30, when The Beast took to the squared circle for a match with his longtime rival, The Undertaker, on a stage on which the Deadman had never lost. The Streak had been built to mythological proportions over two decades, becoming as important (if not more so) than the main event. Lesnar delivered an F-5, covered The Phenom, and the referee slapped the mat three times. Fans in New Orleans sat in disbelief, their jaws dropped as the reality of the moment set in. Lesnar had done what no other Superstar in company history had, defeating WWE's Last Outlaw at WrestleMania and becoming the One in 21 and One.