Jon Heidenreich actually first appeared in WWE in late 2003 with a gimmick that saw him being "controlled" by an entity known as "Little Johnny". He was presented as "trying out" on the Raw brand and was soon sent to Ohio Valley Wrestling to further hone his skills. However, when he first started appearing as the Heidenreich everyone remembers - a complete and utter psychopath - he was presented as a threat to the Undertaker himself. His first feud was with the Deadman after he ran in during his WWE Championship match at 2004's No Mercy pay-per-view and continued to cost him matches for several weeks. The feud culminated in a Casket Match between the pair at 2005's Royal Rumble, which Heidenreich lost, but the fact that someone like Heidenreich - whose in-ring ability was less than great - was able to feud with a guy like the Undertaker was crazy. Heidenreich was released from his WWE contract in 2007.
