- “Please don't make me retire. This job is what keeps me alive. I never married and my dog is dead.”
- ―Jack Marley, at his retirement party[src]
He is forced to retire, even though he resists, insisting he loves his job (It's implied that Mr. Burns had him retire as an excuse for him to have a party). Marge replaced him. He is still seen around Springfield showing that he stayed there after retiring.
After Marge was put on trial for unintentionally shoplifting from the Kwik-E-Mart, Jack appears as the jury's foreman and states the verdict that he and the other jurors reached:Guilty (although it might be just a similar looking character).
He has also been seen working as a janitor on a ship. Following Homer's court martial, as Jack is mopping passed him, he says to him, "I think you're off the hook" and Homer gives his "woo-hoo" cheer.
- In the Latin American dub, he is named Carlos Magaña after his late dubbing actor.
Note: Many of his appearances are brief, background roles. Episodes in which he has an actual role are in bold.