1971 Mexican League season

The 1971 Mexican League season was the 47th season in the history of the Mexican League. The league expanded from 10 to 12 teams, with the expansion teams being the Sabinas Pirates and the Tampico Alijadores. The season started on March 16 and ended on August 18 with the last game of the Serie del Rey, where the Jalisco Horsemen defeated the Saltillo Saraperos to win the championship. The Horsemen became the first team in the Serie del Rey to overcome a 3-0 deficit and the only one until the Tijuana Toros in 2021.

Postseason
The Serie del Rey was played in a best-of-seven series between the North and South Region champions. The Saraperos began by winning the first three games to lead the series. Game four was postponed due to rain and was scheduled for the next day. The Charros won, staying alive by taking the series to game five, played on the same day. The Charros won game five and returned to Guadalajara. There, they won game six and later the decisive game seven, thus reverse sweeping the Saraperos. It was the only time a team had recovered from a 3–0 deficit in the final series until the 2021 season, where the Toros de Tijuana recovered from a 3–0 series deficit and beat the Leones de Yucatán.