As an ice hockey player he played for Cracovia.

With Cracovia he won the Polish league championship three times, in 1937, 1946, and 1947.

He also played for the Polish national team at the 1932, 1936 and 1948 Winter Olympics and four world championships: 1935, 1937, 1938, and 1939.

[1] Kowalski fought in Poland's defense during the German invasion of Poland at the start of World War II in September 1939.

[2] This Polish biographical article relating to ice hockey is a stub.