[1][2] A native of Chicago, Illinois, Pirok entered the AAGPBL in 1943 with the Kenosha Comets, playing for them two and a half years before joining the South Bend Blue Sox (1945–1948).
In that same season, Pirok helped Kenosha beat the Blue Sox in a game, 10–0, collecting four hits in five at-bats, including a double and a triple.
[2][3][4] At one point during the 1945 season she was leading the league with 20 runs batted in, but Kenosha traded her to South Bend along with Phyllis Koehn in return for Lois Florreich and Dorothy Schroeder.
From 1946 to 1948, she was mostly used to fill at infield, outfield and pinch hit, helping South Bend to make the playoffs in these years, but unable to reach the league finals.
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 Stadium de La Habana.