The timekeeper who rings the bell in the wrestling scene is Polynesian Pacific Pro Wrestling promoter Lia Maivia, grandmother of "The Rock" Dwayne Johnson.
Rick gets punched in the jaw three times throughout the course of the episode.
When Earl is talking to Magnum about wrestling a sumo, he says "You think I'm big?"
Ernest Borgnine was 5-foot-9 and 6-foot-4 Tom Selleck was towering over him at the time.