In his club career, Mrázek won 6 Czechoslovak League championships (1947, 1948 2×, 1949, 1950, 1951).

[1] In his head basketball coaching career, Mrázek was a 6 time Czechoslovak League champion (1958, 1962, 1963, 1964, 1967, 1968).

Mrázek was born named Ivo, but he was called Ivan by many, including his mother.

This biographical article relating to a Czech basketball figure is a stub.

You can help Wikipedia by expanding it.This biographical article related to Czechoslovakian sports is a stub.