1) Plural form of the best grade possible. A+
's seem to be almost nonexistent nowadays.
2) Nickname of the American League West's Oakland Athletics.
1) Herman got two A's in two days, thanks to his hour-a-night study program.
2) In 1914, the Braves beat the A's in the World Series. That won't likely happen soon, as the A's can't seem to escape the first round of the playoffs. See choke