This year's WrestleMania didn't quite feel the same without the presence of the Deadman, did it? Sure, WWE WrestleMania 37 wasn't the first time that The Undertaker missed "the grandaddy of them all" but this time it felt a little different. A permanent absence from the big stage, a true retirement - not just sitting a 'Mania out through injury, fitness or lack of a storyline.
Who would bet against The Undertaker not getting the itch to perform again in front of WWE crowds now they are returning, especially with next year's WrestleMania taking place in Texas.
Of course it goes without saying that Mark Calaway deserves his retirement. The Undertaker character deserves to rest in peace at this point and what a legacy over 30 years in professional wrestling he has left behind.
But how well do you really remember the career of the man who saw and lived through it all at WWE? Can you remember which superstars made up his Survivor Series teams? Or how about which of his famous wrestling gimmick matches came first? Or what about which superstars teamed with The Undertaker as WWE Tag Team Champions and who "Booger Red" defeated to become World Champion?
Take our quiz below and see if you can get 100% on all things 'Taker.