Quote from Bert in the episode Spoiler: Corn is Delicious
Bert: I've been doing a little research. It turns out this universe is pretty close to ours before the apocalypse. Couple of differences. Baseball doesn't have a DH rule and they don't have Skechers Slip-Ins. That's a drag. Kripke: Are you weaving anything out there, buddy? Bert: Uh, let's see. Oh, okay. John Cougar is still John Cougar. He never went back to Mellencamp.