Shirley Sjostrom started bowling in 1952. She has rolled 38 700-series.

She has a high career game of 299 rolled at St. Bernards, High Series of 761. Shirley had a high career average of 211 in 1967-68 which was 2nd high in the nation that year. She averaged over 200 for 5 consecutive years and in 1967-68 she had 4 league averages over 200. Shirley won the Mpls. 600 Club tournament. She has many City tournament titles to her credit. She won a team title, singles, all events and a doubles title with Georgene Cordes. She has 2 Minnesota 600 titles to her credit. State team tournament (actual) in 1978-79 with 2841. She won State All Events in 1975 with 1748 score and State All Events in 1959 with 1900 score. She was second in Open Division singles at the WIBC tournament in Las Vegas with 695.

She and Georgene Cordes were WIBC Doubles Champions in 1976. She won the National 600 Club Tournament in 1973 and the National 700 Club tournament in 1970. Shirley ranked in the WIBC top ten (composite list) category 1975-76 – 200 average 1974-75 – 199 average. She was second in the Queens in 1976 – when she averaged 193 in the match play rounds. She represented Minnesota in the World Invitational tournament three times. She won Minnesota Match Game Tournament twice which earned her a spot in the U.S. Open. She won various other tournaments such as Elsie's Lucky 13; The St. Cloud Kegle and the Tribune Classic twice. Shirley is a member of the Minneapolis WBA Hall of Fame for Superior Performance.