The final era of baseball's ten-team playoff format
In short: Before the league expanded to a 12-team field in 2022, the 2021 postseason served as the ultimate snapshot of a specific competitive era. It featured historic firsts, including the first time back-to-back grand slams were hit in a single playoff game.
The 2021 season marked a transitional moment for Major League Baseball. Following the relaxation of COVID-19 restrictions, the league utilized its final ten-team postseason format before expanding to twelve teams in 2022. This tournament was notable for its high level of parity, being only the fourth time in five years that at least three 100-win teams qualified for the playoffs.
The bracket saw several historic milestones and rivalries. The Boston Red Sox secured a victory over the New York Yankees, joining an elite group of only three franchises to win three consecutive postseason series against their rivals. Meanwhile, the Los Angeles Dodgers achieved a ninth straight postseason appearance, punctuated by a dramatic walk-off two-run home run by Chris Taylor against the St. Louis Cardinals.
The American League Championship Series (ALCS) provided one of the most explosive offensive displays in history when J.D. Martinez and Rafael Devers hit back-to-back grand slams for the Red Sox in a single game—a first for any team in postseason play. However, momentum shifted toward the Houston Astros, who eventually clinched the pennant by winning two consecutive blowout games.
The tournament concluded on November 2 with the Atlanta Braves capturing their fourth overall title and first since 1995. By defeating the Astros in six games, the Braves secured a championship that capped off a season defined by high-scoring outbursts and long-standing historical rivalries.
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Sources
- Summary by Intellect · source: 2021 Major League Baseball postseason
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