On July 2, 1963, what was probably the greatest game ever pitched took place at San Francisco's Candlestick Park. Future Hall of Famers Warren Spahn and Juan Marichal dueled to a 1-0, 16 inning decision, each pitcher going the distance. The game's lone run came in the bottom of the 16th, when future Hall of Famer Willie Mays homered off Spahn to end it.
Just to add some more future Hall of Famers to the mix, the Braves slugging teammates Hank Aaron and Eddie Matthews opposed the Giants Mays, Willie McCovey and Orlando Cepeda. This game is surely in my top ten woulda-coulda wishlist. See the box score here.