[2][3] The first AAGPBL spring training outside the United States was held in 1947 in Havana, Cuba, as part of a plan to create an International League of Girls Baseball.
[3][4] Pérez entered the league in 1948 with the Chicago Colleens, playing for them one year before joining the Springfield Sallies (1949–1950), Battle Creek Belles (1951–1952) and Rockford Peaches (1952–1954).
Her career highlight came on August 10 of that year, when she hurled a no-hitter against the powerful Grand Rapids Chicks lineup featuring Wilma Briggs, Betty Foss, Jean Geissinger, Katie Horstman, Pepper Paire and Joanne Weaver, among others.
[7] Pérez compiled a 57–70 record in 155 games, while her 2.73 career ERA ranks her twenty-second in the all-time list of AAGPBL pitchers with at least 1,000 innings of work.
[3] Another tribute to the AAGPBL players came with the 1992 film A League of Their Own, featuring Tom Hanks, Geena Davis and Madonna, and directed by filmmaker Penny Marshall.