Mark William Calaway (born March 24, 1965), is an American retired professional wrestler. He is best known for his career in WWE from 1990 to 2020 under the ring name The Undertaker. Calaway began his career in 1987, working as various gimmicks for World Class Championship Wrestling (WCCW) and other affiliate promotions, and he became USWA Unified World Heavyweight Champion and WCWA Texas Heavyweight Champion during this time. After signing with World Championship Wrestling (WCW) in 1989, he had a brief stint in the mid-card as "Mean" Mark Callous, before joining the World Wrestling Federation (WWF, now WWE) in 1990.