After a quarter of a century, The Undertaker seems to have retired from WWE. The wrestling legend dropped his gloves, hat and trenchcoat in the middle of the ring at the end of Sunday night's WrestleMania 33. The 52-year-old, whose real name is Mark William Calaway, lost the main event to Roman Reigns. Fans have been paying tribute to him with the hashtag #ThankYouTaker and #WrestleMania has been trending. Throughout his career, the Undertaker's been a multiple World Heavyweight Champion, a six-time tag team titleholder and a Royal Rumble winner. The star was first introduced in the 1990's Survivor Series. He debuted as the final member of Ted DiBiase's Million Dollar Team.