#1 Finn Balor became the WWE Universal Champion in just 27 days
This entry stands out from the rest as Finn Balor signed with WWE in 2014 and competed for two years on its developmental brand, NXT. During his time on the black and gold brand, Balor won the NXT Championship once and set the record for the longest title reign.
However, since we are overlooking the time Superstars have spent in developmental territories, we’ll look at The Demon King’s main roster debut instead.
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Balor made his first appearance on the main roster on July 25, 2016, where he defeated Rusev, Cesaro, and Kevin Owens in a Four-Way Match. Later, he beat Roman Reigns for a chance to become the inaugural WWE Universal Champion at SummerSlam 2016.
At SummerSlam, Balor fought through an injury to defeat Seth Rollins to become the Universal Champion just 27 days after his main roster debut. While Balor was forced to relinquish the title a night later, it is still counted as his first world title reign in the company.
Balor has been a top performer in WWE ever since. He is currently back on NXT where he recently became a two-time NXT Champion.