in 1947 o'hara was converted into a pitcher by then manager ralph shinners. in her repertoire she included a fastball, a curve and specially a knuckleball, which she loved to use. she turned in a 6–8 record with a 3.51 earned run average in 21 appearances. the next year she went 4–6 in 20 games while lowering her era to 3.20. used sparingly in 1949, she had a 2–3 mark and a 4.65 era in 11 games.