[7] He received a promotion to the Sarasota Red Sox of the Class A-Advanced Florida State League on his 21st birthday.

[9] In 2002, he played for the Trenton Thunder of the Class AA Eastern League, and competed in the 2002 All-Star Futures Game.

[10] That season, the Boston Red Sox traded Song to the Montreal Expos with Sun-Woo Kim for Cliff Floyd.

[3] In April 2003, while pitching for the Harrisburg Senators, the Expos' Class AA affiliate in the Eastern League, Song threw a no-hitter.

[14] Later that year, the Expos attempted to trade Song and Josh McKinley to the Texas Rangers for Juan González, but Gonzalez used a no-trade clause in his contract to block the deal.

On August 14, he pitched six scoreless innings against the Chinese national baseball team, giving up only two hits while striking out nine.

On August 19, Song pitched 6+1⁄3 innings against Cuban national baseball team, allowing three runs and five hits to earn the win for South Korea.