John Bailey Ober (born July 12, 1995) is an American professional baseball pitcher for the Minnesota Twins of Major League Baseball (MLB).
Ober made his professional debut in 2017 with the rookie ball Elizabethton Twins, recording a 3.21 ERA in 6 games. In 2018, Ober posted a 7-1 record and 3.84 ERA in 14 appearances for the Single-A Cedar Rapids Kernels. He split the 2019 season between the Double-A Pensacola Blue Wahoos and the High-A Fort Myers Miracle, pitching to a stellar 8-0 record and 0.69 ERA in 14 games.