It was not until 1996 that Oswalt began attending comedy clubs and headlining the clubs bringing in crowds to see him. His style of comedy was renown and was latter asked to write for Mad TV. He was the star of his first HBO special in 1997 and it seems to be this which set him up as a standup comedian. His first album was "Fellin' Kinda Patton" and this was released in 2004. He has been acting in shows such as Reno 911, Lewis Black's root of all evil, King of Queens, and Seinfeld. He has had a successful movie career as he acted and stared in several movies such as Reno 911 Miami, Blade Trinity, I now pronounce you chuck and Larry, Ratatouille, and most recently Sex and Death 101.
He has several albums that deal with stand up comedy and these are all available on his website.