 In , Oh played a vital role in the Heroes' bullpen, appearing in a team-leading 69 games (4th in the league).He lowered his ERA to 2.38 and notched 9 holds with a record of 1-0.In , Oh had the best season as a setup man, racking up a career-high 20 holds which ranked him third behind Jung Woo-Ram's 25 and Jong Hyun-Wook's 24.