The Fabulous Baseball Diamond is the largest diamond in the world and the prized jewel of Lady Holiday in The Great Muppet Caper. Following two robberies, masterminded by Nicky Holiday, Lady Holiday has the Baseball Diamond put on permanent display in The Mallory Gallery, and out of her possession. Gonzo overhears Nicky's plans, and Kermit the Frog and friends try to foil the theft, using the Baseball Diamond in a rousing game of, well, baseball.