Jack Te Haki O'Loughlin (born 14 March 2000) is an Australian professional baseball pitcher in the Colorado Rockies organization.

[1] In November 2016, O'Loughlin pitched for the Adelaide Bite, and became the youngest Australian Baseball League starting pitcher.

[1] In 2018, O'Loughlin made his affiliated professional debut for the Low–A Connecticut Tigers, appearing in 7 games and logging a 4.35 ERA with 25 strikeouts in 20+2⁄3 innings of work.

[6] He spent the 2022 season back in West Michigan, recording a 4.01 ERA with 50 strikeouts in 51+2⁄3 innings pitched across 27 contests.

Entering in relief, he pitched three shutout innings, giving up two hits and a walk while striking out two against the Houston Astros.