Based on real-life documentary?

Rating: 10/10 (29 December 2008)

Having read the synopsis and watched a screener version of the movie, I could not help but think of a documentary that I saw on Dutch TV, maybe 1 to 2 years ago about a real-life (ex?) WWF (?) wrestler.
The guy was being followed doing a wrestling tour through the US visiting all kinds of small towns and small stadiums.
He was strung out on drugs half the time (trying to dull out the pain from all injuries) and he too said he was hooked on the attention and lifestyle that he once enjoyed in his glory days.
He also had one daughter that he didn't see grow up. They recently came together again and the documentary showed how awkward their time together was and how they both struggled with this.
In between matches he spend his days in sleazy motels, being strung out on crack or sneaking out (not paying the bills). He even eloped the guys from the camera team a couple of times. In short: a pitiful existence, but the only one he knew.
I can not remember the name of that wrestler or the name of the documentary, but it is so similar to this movie that I can not help thinking it's based on this documentary!
I'm not sure but I think the documentary ended with him dying after an OD of medication and/or drugs?
Does this description sound familiar to anyone? Would anyone know who it was about and what the documentary was called?