The Boston Red Sox have won 14 American League pennants
Posted: August 2026
List of Boston Red Sox pennant-winning seasons. The Boston Red Sox, originally known as the Boston Americans until about 1908, have won 14 American League pennants and 9 World Series titles. Source: Baseball-Reference.com.
1903: 91-47, 14½ games over Philadelphia — won World Series, the first World Series, over Pittsburgh, 5 games to 3
1904: 95-59, 1½ games over New York — no World Series; New York declined to play
1912: 105-47, 14 games over Washington — won World Series over New York, 4-3-1
1915: 101-50, 2½ games over Detroit — won World Series over Philadelphia, 4-1
1916: 91-63, 2 games over Chicago — won World Series over Brooklyn, 4-1
1918: 75-51, 2½ games over Cleveland — won World Series over Chicago, 4-2
1946: 104-50, 12 games over Detroit — lost World Series to St. Louis, 4-3
1967: 92-70, 1 game over Detroit and Minnesota — lost World Series to St. Louis, 4-3
1975: 95-65, 4½ games over Baltimore, won ALCS over Oakland, 3-0 — lost World Series to Cincinnati, 4-3
1986: 95-66, 5½ games over New York, won ALCS over California, 4-3 — lost World Series to New York, 4-3
2004: 98-64, 3 games behind New York, as wild card, won ALDS over Anaheim, 3-0, won ALCS over New York, 4-3 — won World Series over St. Louis, 4-0
2007: 96-66, 2 games over New York, won ALDS over Los Angeles, 3-0, won ALCS over Cleveland, 4-3 — won World Series over Colorado, 4-0
2013: 97-65, 5½ games over Tampa Bay, won ALDS over Tampa Bay, 3-1, won ALCS over Detroit, 4-2 — won World Series over St. Louis, 4-2
2018: 108-54, 8 games over New York, won ALDS over New York, 3-1, won ALCS over Houston, 4-1 — won World Series over Los Angeles, 4-1