Jesse Allen Hahn (born July 30, 1989) is an American professional baseball pitcher in the Seattle Mariners organization.

He has previously played in Major League Baseball (MLB) for the San Diego Padres, Oakland Athletics, and Kansas City Royals.

[10] Hahn was brought up from the Double-A San Antonio Missions, and made his major league debut with the Padres on June 3, 2014.

On January 29, 2018, the Athletics traded Hahn and Heath Fillmyer to the Kansas City Royals for Brandon Moss and Ryan Buchter.

[18] With the 2020 Kansas City Royals, Hahn appeared in 18 games, compiling a 1-0 record with a stellar 0.52 ERA and 19 strikeouts in 17.1 innings pitched.

After not having pitched at any level since 2021 due to injury, Hahn signed a minor league contract with the Los Angeles Dodgers on January 17, 2024.

[21] He was assigned to the Triple–A Oklahoma City Baseball Club to start the season,[22] and pitched 41+2⁄3 innings over 35 games, compiling a 4–1 record and 4.75 ERA with 45 strikeouts.