Theresa Kobuszewski [Koby or Tracy] (July 15, 1920 – March 22, 2005) was an American pitcher who played from 1946 through 1947 in the All-American Girls Professional Baseball League. Born in Wyandotte, Michigan, Theresa Kobuszewski was a feary and respected underhand pitcher for fifteen years before joining the All-American Girls Professional Baseball League as a 26-year-old rookie in 1946.