John Henry Kubiszyn (born December 19, 1936) is an American former professional baseball player.

The Buffalo, New York, native threw and batted right-handed, stood 5 feet 11 inches (1.80 m) tall and weighed 170 pounds (77 kg).

[1] During his junior season in 1957, Kubiszyn averaged 24.6 points per game, a school record that still stands today.

Highlights included a three-hit game in four at bats against the Minnesota Twins' Camilo Pascual on September 17, 1961, and his only Major-League home run, hit off Bill Fischer of the Kansas City Athletics on August 3, 1962 — the winning blow in a 1–0 Cleveland victory.

[4] Jack Kubiszyn settled in Tuscaloosa, Alabama, after leaving baseball, where he founded an insurance agency and served on the city council during the 1990s.