Mark William Calaway (born March 24, 1965) is an American professional wrestler better known by his ring name The Undertaker. He is signed to WWE and is the company's most tenured performer, and he 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 (WCCW) in 1984. He joined World Championship Wrestling (WCW) 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.
The Undertaker has performed under two personas. The first is the role of The Deadman, an undead, occult-like figure, which has consisted of many different styles. He debuted his original Deadman persona during his own on-camera debut at Survivor Series (1990). At this event, the Undertaker was clad as a Western mortician. In October of 1998, the Undertaker appeared as the leader of the Ministry of Darkness (with similar apparel). Since WrestleMania XX, the Undertaker has appeared as a hybrid version of the Deadman character, using elements of the previous Deadman incarnations.
His other persona is The American Bad-Ass, a biker, which he portrayed from May 2000 through November 2003. The Undertaker is also associated with various specialty matches: the Casket match, the Buried Alive match, the Hell in a Cell and the Last Ride match. An important part of the character is the Undertaker character's half-brother Kane, who has also played an important role in The Undertaker's character development. Kane was introduced in 1997, and has both feuded with The Undertaker and performed in a tag-team with him as the Brothers of Destruction.
The Undertaker holds an unrivaled record of being undefeated at WrestleMania, WWE's premier pay-per-view event, with a 20–0 record. Calaway is an eight-time World Champion having won the WWF/E Championship four times and the World Heavyweight Championship three times as The Undertaker, and the USWA Unified World Heavyweight Championship once under the Master of Pain character. The Undertaker is also a seven-time World Tag Team champion: a six-time WWF Tag Team Champion and one-time WCW Tag Team Champion. The Undertaker was the winner of the 2007 Royal Rumble and became the first man to enter the annual event last and win.