Bryce Harper and Kyle Schwarber each hit a grand slam in the same game Saturday night [1], [2].
The achievement marks a historic rarity in Major League Baseball, as no two teammates had accomplished the feat in a single game since 1932 [1].
The event occurred on June 20, 2026 [2], at Citizens Bank Park in Philadelphia. The Phillies were facing the New York Mets in a matchup that saw the Mets' bullpen collapse [1], [2]. This breakdown allowed the Philadelphia offense to mount an explosive run of scoring, culminating in the two grand slams.
While grand slams are frequent occurrences across a full season, having two players from the same lineup clear the fences with the bases loaded in one contest is an extreme statistical anomaly. The last time this occurred was nearly a century ago [1].
Harper and Schwarber provided the primary offensive spark for the Phillies during the victory. The collapse of the Mets' relief pitching was the catalyst for the historic scoring surge, a sequence that turned a standard divisional game into a record-breaking night for the home crowd [1], [2].
League historians and fans have noted the significance of the 1932 benchmark. By matching this mark, Harper and Schwarber have entered a small chapter of baseball history that had remained untouched for 94 years [1].
“No two teammates had accomplished the feat in a single game since 1932.”
This event highlights the volatility of bullpen management in professional baseball. While the Phillies' power hitters provided the spectacle, the historical significance of the game stems from a systemic failure of the Mets' pitching staff to contain runners in scoring positions, creating the specific conditions necessary for two separate grand slams.
