A third baseman, Jok played all or parts of 14 seasons in minor league baseball, where he hit 192 home runs,[1] but his Major League opportunity was limited to 12 total games played with the 1954 Philadelphia Phillies and the 1954–1955 Chicago White Sox.

Born in Buffalo, New York, he threw and batted right-handed, stood 6 feet (1.8 m) tall and weighed 190 pounds (86 kg).

Placed on waivers, he was claimed by the White Sox, who assigned him to their Double-A affiliate, the Memphis Chickasaws, where Jok batted over .300.

But in his only start at third base, on May 1 at Comiskey Park against the Baltimore Orioles, Jok connected for his only Major League home run, a solo shot off Jim McDonald.

As a Major Leaguer, Jok had 22 plate appearances and 19 at-bats; of his three hits, only his homer went for extra bases.