John Edward Hetki (May 12, 1922 – January 10, 2019) was an American long relief pitcher in Major League Baseball who played for the Cincinnati Reds, St. Louis Browns and Pittsburgh Pirates in all or parts of eight seasons spanning 1945–54.

[3] Returning to baseball in early 1945, Hetki made his major league debut with the Reds in September of that year.

[1] Hetki spent 1951 with the Toronto Maple Leafs, and this time he led the International League with 19 victories and 256 innings pitched, while tying for second in ERA with Karl Drews (2.85) behind Jackie Collum (2.80).

Working mostly out of the bullpen, Hetki won 3 and lost 6 for the Pirates in 1953 and went 4–4 in 1954, leading the National League in games finished (46) in that last season.

[1] Overall, Hetki posted an 18–26 record with a 4.39 ERA and 13 saves in 214 pitching appearances (23 starts), striking out 175 batters while walking 185 in 5251⁄3 innings of work.

[1] In between, Hetki played winter ball from 1951–52 with the Navegantes del Magallanes club of the Venezuelan Professional Baseball League, collecting an 18–12 record with a 3.26 ERA in 52 games during the two seasons.