Mary Lou Graham

Mary Lou Graham (later Hamilton; August 15, 1936 – December 24, 2024) was an American baseball player who was a batgirl and relief pitcher in the All-American Girls Professional Baseball League (AAGPBL). Listed at , 149 lb, she batted and threw right-handed.

Born in South Bend, Indiana, Graham attended John Adams High School. In her spare time, she played baseball, basketball and volleyball in local leagues, going through the ups and downs while supporting her beloved South Bend Blue Sox.

She joined the Blue Sox as their batgirl in the 1952 season. Second place South Bend swept fourth place Grand Rapids Chicks in the best-of-three first round, and later claimed the championship title over the Rockford Peaches, 3 to 2 games.

Graham was invited to a try out in South Bend the next year. She attended and was selected as a pitcher for the Blue Sox. Coming out of the bullpen, she hurled eight innings of relief over six games and was not credited with a decision. Graham died in Oro Valley, Arizona on December 24, 2024, at the age of 88.