Lee Seul-Gi joined Daegu FC from Dongguk University in 2009, being part of the draft that year. On 8 March 2009, Lee made his Daegu FC first-team debut in a match against Seongnam Ilhwa Chunma. On 22 March 2009, Lee scored his first goal against Pohang Steelers. He scored his 2nd goal in the 1-2 loss to Incheon United at the Incheon Munhak Stadium on 2 May. Lee scored a further goal in an away match against Ulsan Hyundai Horang-i in a 1-3 loss on 12 July. Lee continued to play a major role for the club during the 2010 season, but only found the net once in 23 games.