- Bats Right, Throws Right
- Height 6' 1", Weight 215 lb.
- School Inha University
- High School Gwangju Jeil High School
- Debut July 21, 2002
- Final Game May 29, 2007
- Born May 24, 1977 in Kwanju, South Korea
Jae Seo signed with his hometown KIA Tigers for 2008, inking a $1.6 million deal. He was only 5-5 with a 4.05 ERA in the 2008 KBO season. He fell to 5-4, 6.13 in 2009, clearly the worst member of the rotation on the league's regular-season pennant winners.