Jae Seo was a pitcher for the Mets during the 2000s. He pitched one inning in 2002 and appeared in 70 other games between 2003 and 2005. Seo had 22 wins, 224 strikeouts and a 3.85 earned run average as a Met.
Seo made his major league debut on July 21, 2002. He pitched a perfect bottom of the eighth in a 9-1 Mets loss at Cincinnati. In '03, Jae recorded nine wins and struck out 110 batters in 188 innings pitched. At Pittsburgh on April 17, he got his first major league victory in the Mets' 7-2 triumph over the Pirates. Seo pitched eight innings and chalked up a win in a 4-2 Mets victory over the Braves on May 31 at Shea Stadium. He hurled six and two-thirds innings and got the win in the Mets' 5-0 triumph at Florida on June 17. Jae was the winning pitcher in a 5-1 Mets victory at San Diego on August 21. He also got the win in the Mets' 9-3 at Florida on September 27.
In 2004, Seo made 21 starts and three relief appearances. He had 117 and two-thirds innings pitched for the season. At Los Angeles on May 29, Jae pitched six and one-third innings and recorded the win in a 6-1 Mets triumph over the Dodgers. He was the winning pitcher in the Mets' 7-4 victory at Arizona on May 13. Seo hurled six innings and got the win in a 4-1 Mets triumph over the Marlins on June 13 at Shea. He had five strikeouts in six and one-third innings for the win in the Mets' 7-5 victory at Cincinnati on June 29. Jae also pitched a scoreless 11th inning to pick up the win in a 4-3 Mets triumph over the Cubs on September 25 at Shea.
Seo had an 8-2 won-lost record in 14 games pitched on 2005. He posted a 2.59 ERA during the year. Jae pitched seven innings of one-hit shutout ball for the win in a 3-2 Mets victory over the Phillies at Shea on May 4. He hurled seven and one-third innings and got the win in the Mets' 2-0 triumph over the Cubs on August 6 at Shea. Seo had six strikeouts in eight inning pitched to earn the win in a 5-1 Mets triumph at Los Angeles on August 13. He pitched eight scoreless innings for the win in the Mets' 1-0 victory over the Nationals on August 19 at Shea. Jae had seven innings pitched, a double and an RBI in an 18-4 Mets win over the Diamondbacks at Arizona on August 24. He also struck out six batters in seven innings and got the win in a 7-1 Mets victory over the Marlins at Florida on September 4.
In 2006, Seo was traded to the Dodgers. He pitched for the Los Angeles team and with the Tampa Bay Devil Rays over two years. Jae then pitched three seasons for the Kia Tigers in his native Korea to conclude his career.