Who won the 1971 World Series?

The Pittsburgh Pirates won the 1971 World Series, beating the Baltimore Orioles 4–3.

Who won the 1971 ALCS?

The Baltimore Orioles beat the Oakland Athletics 3–0 in the 1971 ALCS. That won the American League pennant.

The Pittsburgh Pirates beat the San Francisco Giants 3–1 in the 1971 NLCS. That won the National League pennant.

Each league's two division winners met in a best-of-five League Championship Series, and the pennant winners met in the World Series.

Series by series

World Series. The Pittsburgh Pirates beat the Baltimore Orioles 4–3 in the 1971 World Series.

ALCS. The Baltimore Orioles beat the Oakland Athletics 3–0 in the 1971 ALCS.

NLCS. The Pittsburgh Pirates beat the San Francisco Giants 3–1 in the 1971 NLCS.

Final

ALCSBest of 5

BAL wins 3–0

NLCSBest of 5

PIT wins 3–1

World SeriesBest of 7

PIT wins 4–3

Quick answers

Who won the 1971 World Series?: The Pittsburgh Pirates won the 1971 World Series, beating the Baltimore Orioles 4–3.
Who won the 1971 ALCS?: The Baltimore Orioles beat the Oakland Athletics 3–0 in the 1971 ALCS. That won the American League pennant.
Who won the 1971 NLCS?: The Pittsburgh Pirates beat the San Francisco Giants 3–1 in the 1971 NLCS. That won the National League pennant.
How did the 1971 MLB playoffs work?: Each league's two division winners met in a best-of-five League Championship Series, and the pennant winners met in the World Series.