Saw it was on Film4 last night I haven't seen the wresetler but its on my to watch list so will do at some point heard its good, he was great in Sin City as well. Looking at IMDB his career seems to have taken off again since the Wrestler so hopefully there's more good films to come from him.
I think that was the point, at least thats what was being talked about during the release of The Wrestler, the whole relaunching a bad career.
I would also like to add that i since gave in and watched The Wrestler and tbh it was a good movie, so thats 2 films that he has been good in and not forgetting Iron Man 2 i suppose so thats 3, they say wine gets finer with age, the same obviously applies to his acting.