The Kiwoom Heroes' sixth player has entered Major League Baseball through the posting system, bringing in nearly 70 billion Korean won in total transfer fees.

Kiwoom Heroes' 29-year-old captain Song Sung-mun has set off for the U.S. to undergo a physical and sign his contract. American media report that a three-year, $13 million agreement has been reached, pending official confirmation. Since Kang Jung-ho in 2014, Kiwoom Heroes have sent six players to MLB via the posting system, earning nearly 70 billion Korean won (about 380 million RMB) in cumulative transfer fees.

Kang Jung-ho and Park Byung-ho challenged the Major Leagues through the posting system after the 2014 and 2015 seasons respectively, with Kiwoom Heroes receiving winning bids of $5.002 million and $12.85 million at those times.

After the 2018 agreement between MLB and Asian baseball leagues switched to a bidding system, players could negotiate contracts with teams, and a certain percentage of the total contract value would be paid to the original club as a transfer fee. For example, Kim Ha-seong's four-year, $28 million contract with the San Diego Padres brought Kiwoom Heroes $5.525 million in transfer fees; Lee Jung-hoo’s six-year, $113 million contract with the San Francisco Giants earned the Heroes $18.825 million.

Including recent transfers of Kim Hye-seong and Song Sung-mun, OSEN estimates that the Heroes’ cumulative transfer fee revenue over the years has reached $46.802 million.

Kiwoom Heroes hold a unique position in the Korean Baseball Organization (KBO) as they lack a large corporate parent company, with Kiwoom Securities serving only as the naming sponsor. As a well-known small-budget team in Asian baseball, the Heroes rely on baseball-related revenues for independent operation. In 2025, the total salaries of the top 40 highest-paid players on the team amounted to 4.39756 billion Korean won (about 23.4 million RMB), with an average annual salary of approximately 585,000 RMB per player. Therefore, supporting their talented players to enter MLB via the posting system has become a key strategy for the team’s management and growth.