The Undertaker is a nickname of:
Mark William Calaway (born 1965), American professional wrestler
Bill Baker (Canadian football) (born 1944), Canadian retired football player
Vincent Brown (linebacker) (born 1965), American former National Football League player and current college coach
Johnny Cash (1932–2003), American singer-songwriter, actor and author, early in his career
Stefano Magaddino (1891–1974), Sicilian mafioso who became the boss of the Buffalo crime family in western New York
Chris Walsh (American football) (born 1968), American retired National Football League player