The Undertaker On WrestleMania 37: âI Kept Thinking I Should Be Thereâ He retired from wrestling last year after his Boneyard Match with AJ Styles at WrestleMania 36. '); âI was fine all the way until that first ballyhoo of fireworks,â Undertaker said. âFortunately, I was home, which made it a little easier, but going through the show and watching, I kept thinking to myself, âYou should be there.â âI had to work through that. Itâs a little difficult once WrestleMania starts. I started second-guessing myself. So much of my history revolves around WrestleMania. There was a bit of an emotional tug of the heartstrings watching this year, but itâs time for me to step aside and let this next generation have the reins and go where theyâre going to go.â