'The Demon of Death Valley' may have rode off into the sunset on his motorcycle (jury's still out on that one) following that now-iconic Boneyard Match at WrestleMania 36, but he can look back on what is probably in all honesty the greatest career in professional wrestling history with pride.
When The Undertaker says he has nothing left to accomplish, he literally means that he has nothing left to accomplish. Not only has the man achieved a legacy like no other, amassed an incredible amount of accolades and provided audiences with the best wrestling character of all time, he's also gifted us with some of the greatest matches in WWE history.
'Taker vs. Angle? Incredible wrestling. 'Taker vs. HHH? Violent brilliance. 'Taker vs. Michaels? Literal perfection (all five of them).
But it wasn't always 30-minute classics, faux finishes and Jim Ross losing his freakin' mind for The Undertaker because, over that three-decade career of his, 'The Lord of Darkness' has had a few, well, less brilliant affairs.
But we're not just talking about duds and squashes here. No, we're talking about the real misfires. Whether it was an opponent he was just never going to gel with in the ring, or indeed down to his own physical limitations in his later career, let's take a look at some of the rare blips on an otherwise perfect career for The Undertaker.