Sungjun Lee (Gyeonggi, KOR) lost 6-2 to Soo-Hyuk Kim (Gang Won, KOR) in the Final of the Korean Curling Championships, held April 14 - 20, 2015 in Incheon, Korea. To advance to the championship game, Lee won 8-4 over Se-Hyeon Seong (Uiseong, KOR) in the semifinals of the 2015 Korean Curling Championships in Incheon, Korea;
 
Lee finished 5-2 in the 8-team qualifying round. . In their opening game, Lee defeated Hyeonjun Hwang (Seoul, KOR) 8-2, then won 10-3 against Jae Ho Lee (Seoul, KOR). Lee went on to lose 10-3 against Seong. Lee responded with a 6-4 win over Hyun Jun Yoo (Uijeongbu, KOR). Lee won 5-3 against Seungho Seo (Chuncheon, KOR). Lee went on to lose 8-7 against Kim. Lee responded with a 10-5 win over Jihoon Seong (Cheongju, KOR) in their final qualifying round match.
 
Lee ranks th overall on the Year-to-Date rankings with points earned so far this season.