|Country of Birth:||South Korea|
|Peak League:||Challenger I (NA)|
|Peak League:||Diamond I (KR)|
Lee "Knight" Geon was previously the mid laner for TEAM4NOT.OCE.
Lee "Knight" Sung-jin is from South Korea. He originally competed under the name Loyal and later LouisXGeeGee.
Loyal was a substitute AD carry for the Jin Air Falcons and played in one set of Champions Winter 2013-2014, against the Jin Air Stealths, replacing starting AD carry Roar. The teams split the series 1-1.
Loyal changed his name to Chorong and moved to North American to join Team Dragon Knights in September 2014, with teammates Jackpot, Miso, and Guardian; shortly thereafter, Remilia (Yuno) joined the team, and they were to compete in the Expansion Tournament. However, despite qualifying via the ranked 5s ladder, the team dropped out of competition and did not participate in the Expansion Tournament. Shortly after, they disbanded, and only Chorong remained on the team.
Team Dragon Knights was rebuilt in January 2015, and Chorong, now renamed to LouisXGeeGee, was the only member of the team to remain on the roster; kina, Kez, Kyle, and KonKwon joined him. This time, the team did compete in the NACS Spring Qualifier, where they successfully defeated Team Frostbite and then Roar to qualify for the season. They placed second overall, with a 7-3 record, sending them to the playoffs. After a first-round victory against Team Fusion, they lost in the finals 3-1 to Enemy eSports. Despite the fact that they had placed higher than Fusion, Winterfox chose to play against them in the Summer Promotion Tournament. TDK used substitute mid laner Alex Ich in their promotional matches and won 3-1, successfully qualifying for the NA LCS Summer Split. In June he joined Team Coast as a substitute and changed his role from AD to Mid laner.
- Built Essence Reaver on Sivir and Lucian in Team Dragon Knights's first two games against Winterfox in the 2015 NA LCS Summer Promotion Tournament; at the time the item had almost never been built in competitive play.
- Changed his legal name from Lee Sung-jin (이성진) to Lee Geon.