The Surprising Card Game Origins of Baseball Grand Slams

A grand slam scores the maximum four runs, but the term actually comes from bridge. In that card game, a grand slam means winning every single available trick during a match.

While hitting a home run creates a loud sound that fits the name, baseball historians trace the phrase back to high-stakes card tables. The term implies a complete, perfect victory where you capture every possible point. It is a colorful linguistic crossover from the parlor to the diamond. It turns out this famous baseball feat shares its name with the ultimate winning hand in bridge.