Mark William Calaway (March 24, 1965), better known by his ring name The Undertaker (sometimes simply Taker), a American professional wrestler who performed in WCW and WWE. He is the company's most tenured performer, and is the only remaining active competitor from the very first episode of WWE Raw in 1993. Calaway began his wrestling career with World Class Championship Wrestling in 1984. He joined World Championship Wrestling as "Mean" Mark Callous in 1989. When WCW did not renew Calaway's contract in 1990, Calaway signed with the World Wrestling Federation. After debuting as Kane the Undertaker, the name was shortened to The Undertaker and he has remained with the company since.
As The Undertaker, Calaway's gimmick was a horror-themed, macabre entity who employed scare tactics and held links to the supernatural. The character was reinvented as a biker during a period in the early 2000s before returning to his previous gimmick in 2004. The Undertaker was the storyline older half-brother of fellow WWE wrestler Kane, with whom he has alternately feuded and teamed with as The Brothers of Destruction. The Undertaker has been involved in various pivotal storylines and matches within WWE history.
The Undertaker was also known for The Streak, an unprecedented run of 21 straight victories at WWE's leading pay-per-view event, WrestleMania (including main event matches at WrestleMania 13, WrestleMania XXIV, WrestleMania XXVI and WrestleMania 33), before he sustained his first loss at WrestleMania XXX to Brock Lesnar. Prior to his WWF/WWE career, he also held the USWA Unified World Heavyweight Championship once and since unseating Hulk Hogan as WWF Champion in 1991, he has won the WWF/E Championship four times and the WWE's World Heavyweight Championship three times. He also won the 2007 Royal Rumble.