The Undertaker is the longest-running character currently on the active WWE roster. His most recent match took place in November 2015 at the Survivor Series PPV, around 22 years on from the first edition of Monday Night Raw. On that 1993 show, Undertaker faced Damien Demento in the main event. Since then, 'Taker has evolved beyond belief. The man behind the infamous persona, Mark Calaway, has constantly found ways to keep himself relevant in the company, and he's still around to this day. It seems that The Undertaker may retire sooner rather than later, because his body has noticeably aged over the past 5 years or so. There's no shame in that - Calaway has worked an extremely physical style for many years and his battered frame could use some relief. When he does step away from the ring, Undertaker will create a sizeable hole WWE may never be able to fill. He means a great deal to the promotion, and is regarded today as one of the greatest performers of all-time. He is the only one on this list who continues to wrestle at such a high level.
