- Who
- Mark Calaway, The Undertaker
- What
- 27:139 year(s):day(s)
- Where
- United States ()
- When
Making his debut on 20 November 1990 as part of the Survivor Series, Mark Calaway (aka "The Undertaker", USA) has had the longest ongoing tenure with World Wrestling Entertainment (WWE) of any active wrestler: 27 years 139 days as of 8 April 2018. Despite announcing his retirement from WWE at WrestleMania 33 on 2 April 2017, "The Undertaker" made a big comeback – defeating the most prolific world champion, John Cena – at WrestleMania 34, which took place at the Mercedes-Benz Superdome in New Orleans, Louisiana, USA, on 8 April 2018.
As of the same date, the next longest WWE tenure for an active wrestler is that of Paul Levesque (aka "Triple H", USA). Making his debut on 30 April 1995 as part of TV series Wrestling Challenge, his career run stood at 22 years 343 days as of 8 April 2018.
