Undertaker was on the injured list during WrestleMania X, but returned a year later to face King Kong Bundy. Nothing about the match was of interest except for something briefly mentioned by Vince McMahon on commentary: in terms of the PPV, Undertaker was undefeated with three wins. It wasn't that big a deal.

Who did Undertaker lose his streak to?

At WrestleMania XXX in 2014, The Undertaker lost to Brock Lesnar, thus ending The Streak.

How long was Undertaker undefeated for?

The Undertaker's 21-0 Undefeated Streak at WrestleMania

While the decision to finally end “The Streak” will be debated for years to come, it's clear that the 21-match streak will forever go down as one of the most untouchable feats in wrestling history.