His name is Mark Calaway in 1965, before his undertaker role, he was Mean Mark Callous and part of the Skyscrapers with Dan Spivey/Sid Vicious/Mike Enos(Blake Beverly) combination.

He is 4 time WWF Champion and Two time World Heavyweight Champion(The old WCW/NWA Championship is called that in the WWE. When Vince bought WCW, he also bought the rights to the NWA). He is also 17-0 in Wrestlemania matches. He also won the 2007 Royal Rumble from the 30th position. In 2009, he is currently under contract with the WWF but on the inactive roster.

He debuted in professional wrestling in 1984 in Texas Wrestling, World Class the IWCCW. His name was Texas Red. He left and joined the CWA and Jerry Jarrett would then merge the CWA with IWCCW and call it the USWA. In 1989, he won his first championship, The USWA Heavyweight title by beating Jerry The King Lawler while calling himself The Master of Pain. He would then go on to win the WCWA Texas Heavyweight Championship.

He then went to WCW as Mean Mark Callous. He also teamed with Daney Spivey as The Skyscrapers and feuded with the Road Warriors. In 1990, WCW did not renew his contract and he wrestled for a short time in NJPW in Japan as Punisher Dice Morgan. He left there in late 1990 and signed with the WWF as Cain The Undertaker with manager Brother Love. He sonn dropped the Cain and became just The Undertaker and replaced love with Paul Bearer as his manager. Paul had previously been Percy Pringle in IWCCW/USWA. He won his first Wrestlemania in Wrestlemania VII, defeating Jimmy "Superfly" Snuka.

He then began feuding first with The Ultimate Warrior, then Rand Savage and fnally Hulk Hogan. He won his first WWF Heavyweight title from Hogan in Survivor Series. Jack Tunney would "order" a rematch 6 days later and Hogan would take back the title. Undertaker would take a hiatus in 1994 due to a serious back injury.

In 1997, with Mark Calaway in WCW, Ted DiBiase introduced The Undertaker which was really Brian Lee. Not really sure if this was supposed to fool anyone. The real Undertaker would return to the WWF later that year in Summerslam. He defeated Brian Lee with 3 tombstone piledrivers.

In Wrestlemania XI, the Undertaker would defeat King Kong Bundy. He would then take another hiatus to have his orbitol bone around his eye repaired. He then came back for the 1995 Survivor series in a mask. He would be unmasked by Brett Hart during their championship match at the Royal Rumble but Diesel(Kevin Nash) would interfere and cost Undertaker the match. A month later, in a great idea, during a cage match between Deisel and Bret Hart, The undertaker would come up through the wrestling mat floor and drag Deisel to "Hell". This feud would culmainate with Undertaker defeating Deisel in Wrestlemania XII.

Undertaker would then have a long feud where Mankind kept interfering in his matches and Paul Bearer would turn on the Undertaker and allow Mankind to beat him. At Wrestlemania XIII, Undertaker would defeat Psycho Sid Vicious for the WWF Title, this is when the worked in the badly burnt half brother Cain angle. Supposedly, Cain was a pyro, burnt their house down and killed himself and their parents. Unbeknownst to Undertaker, Cain survived and was raised and institutionalized by Paul Bearer.

Undertaker would then feud with Shawn Michaels, culminating in the first ever Hell in a Cell match. Kane would rip off the door to the cell, tombstone piledrievr The Undertaker and Michaels would pin him for the win. Kane was now managed by Paul Bearer. Undertaker would fight Michaels again in a casket match at The Royal Rumble where Kane again cost Undertaker the win by locking him in the casket and setting it on fire. WWF officials would finally get the coffin open to "rescue" The Undertaker but he was no longer in the casket. They would continue this feud in Wrestlemania XIV, where The Undertaker would defeat Kane.

He then renewed his feud with Mankind(Mick Foley) after Foley interfered in another Kane match that cost Undertaker. This would lead to one of the most talked about Hell in a Cewll matches in King of the Ring PPV. During the match, Undertaker threw Mankind off the roof of the 16 foot cell onto the Spanish announce table below, in what was a preplanned move. He later chokeslammed Mankind through the roof of the cell into the ring which really did knock Foley unconscious and finished the match by chokeslamming Mankind onto a pile of thumbtacks. It was one of my personal favorites that I will never forget.