Another name could soon be added to the growing list of Korean Baseball Organization stars making the jump to MLB. According to Yonhap News Agency, Kiwoom Heroes infielder Sung Mun Song intends to ask his club to post him for the offseason, allowing major league teams to bid on his services.
If he follows through, Song would join a recent wave of KBO standouts heading stateside: Ha-Seong Kim with the Padres in 2021, Jung Hoo Lee with the Giants in 2024, and Hyeseong Kim with the Dodgers just last winter. Now, at 29 years old, Song is ready to test himself against the best.
Song’s Profile
Across nine KBO seasons, Song has been a steady offensive presence, carrying a career slash line of .280/.345/.423 into Tuesday’s action. Last year, he put together his best season to date with 29 doubles, 19 home runs, and 21 steals. He’s matched or surpassed those totals already in 2025, sitting at 28 doubles, 20 homers, and 20 steals with a full month still to play.
Song had been on track for free agency this winter but signed a six-year, 12 billion won (roughly $8.6 million USD) extension with the Heroes in August. Importantly, the deal included language that allows him to pursue posting without penalty while also giving Kiwoom some cost certainty if he stays.
For a time, Song wasn’t certain if he would pursue MLB. He reportedly questioned whether his skill set was enough to thrive at the highest level. But a recent conversation with Padres infielder Ha-Seong Kim — who has successfully transitioned to the majors — may have tipped the scales in favor of making the leap.
MLB Market Fit
Song is primarily a third baseman, and that’s where things get interesting. This winter’s free agent market at third base looks thin, with Eugenio Suárez the top domestic option unless Alex Bregman exercises his opt-out with Boston. Max Muncy, Yoan Moncada, and Japan’s Munetaka Murakami (expected to be posted himself) are also expected to be available, but overall, the pool is limited.
That opens the door for Song as a cost-effective alternative for clubs unwilling to spend big but still in need of production at the hot corner. Teams like the Oakland Athletics or Arizona Diamondbacks — clubs often priced out of top-tier free agents — could see real value in a player with Song’s balanced profile of gap power, developing home run ability, and enough speed to steal bases.
If posted, Song won’t carry the same hype as Lee or Murakami. But his versatility, affordable price tag, and productive track record in Korea may be enough to make him one of the more intriguing under-the-radar names of this offseason.
