Kathleen Lois "Flash" Florreich (April 29, 1927 – September 11, 1991) was a pitcher and utility player who played from 1943 through 1950 for three different teams of the All-American Girls Professional Baseball League.

In its 12 years of history, the AAGPBL evolved through many stages, including shifting from underhand to sidearm to overhand pitching, but Florreich easily made the transition in each one of the changes.

The 60 players were placed on the rosters of four fifteen-player teams based in Rockford of Illinois, South Bend of Indiana, and Racine and Kenosha of Wisconsin.

[4][5] Florreich entered the AAGPBL in 1943 with the South Bend Blue Sox, playing for them two and a half years before joining the Kenosha Comets (1945-'46) and Rockford Peaches (1947-'50).

Although originally a center fielder with South Bend, she switched to third base with Kenosha in 1945 and became a part-time pitcher in 1946, joining a pitching staff bolstered by Helen Nicol.

She was also one of two hundred players to attend the first AAGPBL spring training outside the United States, which was held in 1947 in Cuba at the Gran Estadio de La Habana.

She was injured for the Championship Series against the Fort Wayne Daisies, but the Peaches still won in seven games to become the most successful team in All-American Girls Professional Baseball League history, winning four titles in 12 seasons, including three in a row.

A woman who loved to travel, fish, and be outdoors, Florreich lived the rest of her life in the Gulf of California area in Mexico, where she died at the age of 64.