Cyril Charles Slapnicka (March 23, 1886 – October 20, 1979) was a Major League Baseball pitcher and executive. He played for the Chicago Cubs (1911) and Pittsburgh Pirates (1918). His playing career was unusual in that he went almost seven years between major league appearances. He also played 18 years of minor league ball. In 10 total games pitched Slapnicka had a record of 1–6 with an ERA of 4.30 in 73.1 innings pitched. He started eight games, completed five, and finished two. He also had one save. Slapnicka died in his hometown of Cedar Rapids, Iowa, at the age of 93.