Joe Jackson -- "Shoeless Joe" -- was a feared hitter in his day. He was also notoriously illiterate.
One day as Jackson stood at the plate, a leatherlunged fan behind third base kept yelling at him: "Hey Joe! Spell cat!"
Jackson paid the heckler no heed, focusing on the pitcher. He got an offering he liked, lined it into the gap, sprinted around the bases and slid into third.
Then Jackson scanned the seats until he had located his tormentor. He spit tobacco juice in his direction and yelled back, "Hey, (expletive)! Spell triple!"