Joan Sindelar  played in the All-American Girls Professional Baseball League between 1949 and 1953 in the positions of first base and utility outfield.  She was born in Chicago IL, and her nickname was Jo Jo. Listed at 5 ft 7 in (1.63 m), 125 lb., she batted and threw right-handed.  She is recorded to have said that playing in the league was one of the best things that happened to her in her life.

Joan played for the Chicago Colleens (in 1949 and 1950) and the Kalamazoo Lassies (in 1950, 1951, 1952 and 1953).

Following her baseball career, Joan taught in schools in Kalamazoo, MI and Phoenix, AZ.  She was remembered by her students, having made a "profound impact" on them.  She was an active golfer, joined a country club and became a champion. She won two annual memorial tournaments four club championships.

Once she retired from teaching, Joan adopted a rural life in which she raised animals that she sold. She was known to take in a whole array of strays which she nurtured back to health. She really enjoyed working her yard, feeding birds and growing flowers.

When she died at age 71 on April 12, 2003.   She was survived by a close friend, three nieces residing in Chicago, and many great nieces and nephews.