2) Brock Lesnar was the Universal Champion for 504 days

Brock Edward Lesnar is the only man in history to hold a UFC and WWE heavyweight title. He is also the youngest WWE champion in history.

The Beast Incarnate defeated Goldberg at WrestleMania 33 to win the Universal Championship. He was the first superstar to have won both WWE and Universal Championship. 

This marked the beginning of one of the most successful and longes championship reigns in this era of WWE. The Beast conquered some severe challenges like Roman Reigns, Braun Strowman, Samoa Joe.

The Tribal Chief faced Lesnar at SummerSlam 2018 and defeated the latter. As a result, his title reign ended in 504 days and was the longest since 1988.