|Name||Lee Ho-seong (이호성)|
|Country of Birth||South Korea|
|Alternate IDs||KT Leopard, 나진 퓨어, 나진 듀크|
He was formerly known as Leopard
Duke, formerly Leopard, joined the KT Rolster Bullets in Season 3. He did not play with the team on stage untilIEM 8 World Championship, when he was moved to the starting roster. In said tournament, they were able to take home the victory by beating Fnatic (3-0) in the final match. In Korea, Duke and team participated in HOT6iX Champions Spring, made it to the quarterfinals but fell short after losing to NaJin White Shield (3-2).
After leaving KT Rolster Bullets, Duke changed his name to Leopard before joining NaJin Black Sword as the team's starting top laner. His first tournament with NJBS was HOT6iX Champions Summer, where they made it to the quarterfinals but dropped to SK Telecom T1 S (3-2).
Following the changes with the rules for OGN, NaJin merged Sword and Shield to form NaJin e-mFire. Shield's then top laner, Save, left the organization, thus giving Duke sole possession of starting top laner. The team was invited to participate in SBENU Champions Spring, placed 6th during the regular season and were unable to proceed to the playoffs. Despite the team's mediocre performance, Duke was still able to win the award for MVP of the season.
In SBENU Champions Summer, NaJin finished 5th and was able to qualify for the playoffs. However, their success was short lived as they lost to KOO Tigers (2-1) in the first round. Despite that, they managed to earn enough circuit points to qualify for the Regional Finals. Then again, they lost to Jin Air Green Wings (3-0) in the first round.
NaJin participated in the KeSPA Cup but lost to Rebels Anarchy (2-1) in the first round. Duke then parted ways with the team to join SK Telecom T1. They attended IEM 10 Katowice despite being the sixth-place team in the LCK that time. Blank was brought in as a substitute jungler for bengi and swept the tournament. They were able to win the title after winning seven games. Following their international success, they finished 3rd in the regular season and qualified for the playoffs. SKT won the finals, the team's third championship title in a row and a seed to MSI.
|2016-10-29||2016 Season World Championship||SKT T1 3 : 2 Samsung Galaxy|
|2016-08-12||LCK 2016 Summer Playoffs||SK Telecom T1 2 : 3 KT Rolster|
|2016-05-15||2016 Mid-Season Invitational||SK Telecom T1 3 : 0 Counter Logic Gaming|
|2016-04-23||LCK 2016 Spring Playoffs||SK Telecom T1 3 : 1 ROX Tigers|
|2016-03-06||IEM Season X - World Championship||SK Telecom T1 3 : 0 Fnatic|
|2015-09-02||2015 Season Korea Regional Finals||Najin 0 : 3 Jin Air GreenWings|
|2014-08-09||ITENJOY NLB Summer 2014||NaJin Black Sword 0 : 3 SK Telecom T1 K|
|2014-05-14||bigfile NLB Spring 2014||kt bullets 0 : 3 SK Telecom T1 K|
|2014-03-16||IEM Season VIII - World Championship||kt bullets 3 : 0 Fnatic|
- January 9th, Interview with SKT Duke: "I called SKT myself as soon as I left Najin" translated by friedkale on reddit (Original (Korean))
- January 22nd, SK Telecom ‘Duke’ Lee Ho-seong, “I wanted to join a team that could win a tournament” with Fomos, English translation by krbnu.
- January 22nd, SKT T1 vs Samsung MVP Interview with Bang & Duke with OnGameNet, English translation by krbnu.
- January 29th, SKT T1 vs E-mFire MVP Interview with Duke & Bang with OnGameNet, English translation by krbnu.
- February 4th, SKT T1 Duke, “I want to carry against our Telecom rivals KT” with Inven, English translation by krbnu.’'
- February 4th, SKT T1 vs SBENU Sonicboom MVP Interview with Duke & Faker with OnGameNet, English translation by krbnu.
- February 13th, SKT T1 vs KT Rolster MVP Interview with Duke with OnGameNet, English translation by krbnu.
- March 11th, SKT T1 vs Afreeca Freecs MVP Interview with Duke & Faker with OnGameNet, English translation by krbnu.
- April 2nd, SKT T1 Duke Postmatch Interview, “I’m already nervous about the KT Rolster match” with Inven, English translation by krbnu.’'
- December 8th, Duke: The Upgrade SK Telecom T1 Wants by Aaron on League eSports Talk
- May 4th, The Quest for S-Tier: How Good is SKT's Duke? by Tim Svevenhuysen on theScore