Definition: A grand slam is a home run hit when all three bases are occupied by runners (the “bases are loaded”). Because the batter and the three runners on base all score, a grand slam results in four runs, which is the maximum number of points possible on a single play in baseball.
A grand slam is one of the most exciting and impactful plays in the sport because it can instantly turn a losing game into a winning one. When a pitcher has the bases loaded, they are under immense pressure to throw strikes without making a mistake; if they leave a pitch over the middle of the plate, a strong hitter can drive it over the fence to clear the bases. It is considered a rare feat, and many professional players go through their entire careers without hitting more than a few.
The term “grand slam” is borrowed from the card game Bridge, where it refers to winning every possible trick, and it has since become a staple of sports terminology. In a stadium, a grand slam usually triggers the loudest cheers of the night and often forces the opposing team to change their pitcher immediately. Because it provides four runs at once, it is the ultimate “game-changer” for any offense.
Example: With his team trailing by three runs in the final inning, the catcher hit a towering grand slam to win the game.
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