He left the squared circle for the last time on Sunday night
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Wrestlemania 33: Was there more than one person who played The Undertaker in WWE?, The Independent
WWE WrestleMania 33: List of Andre the Giant Battle Royal Entrants
WrestleMania 33 - Wikipedia
WWE WRESTLEMANIA 33 REACTIONS! HARDY BOYS RETURN! UNDERTAKER RETIRES! CROWD IS TRIGGERED!
WrestleMania 39 - Wikipedia
WrestleMania 33 results: Brock Lesnar wins title, Undertaker loses to Roman Reigns
Watch WrestleMania Season 33, Episode 1: WrestleMania 33
Who is The Undertaker, was there more than one and is the WWE legend facing John Cena at WrestleMania 34?
WWE WrestleMania 33 results, recap: Undertaker retires, John Cena gets engaged – The Denver Post