Isabel "Lefty" Álvarez (October 31, 1933 – June 6, 2022)[1] was a Cuban pitcher and outfielder who played in the All-American Girls Professional Baseball League between the 1949 and 1954 seasons.

The first AAGPBL spring training outside the United States was held in 1947 in Cuba, as part of a plan to create an International League of Girls Baseball.

[3][4][5] From 1948 to 1949 seven Cubanas played in the AAGPBL: Isora del Castillo, Luisa Gallegos, Mirtha Marrero, Migdalia Pérez, Gloria Ruiz, Zonia Vialat and Álvarez.

At the age of 15, she joined the league with the encouragement of her mother, who felt the United States offered better opportunities than Cuba did.

[9][10] Álvarez is part of the AAGPBL permanent display at the Baseball Hall of Fame and Museum at Cooperstown, New York opened in 1988.