In 2011, he became a founding member of StarTale’s League of Legends team and played jungler. The next year he left the team after the Spring season, and in December, the year he turned 27, he joined SK Telecom T1 as analysis coach.
The breakthrough yearIn October 2013, the year he turned 28, he beat Royal Club 3–0 and lifted the Worlds trophy as the first Korean team to do so.
In 2014, he won the domestic NLB and the All-Star Invitational. In 2015, the team won Spring, Summer and Worlds. In 2016, he won a second straight Worlds.
In May 2017, he won the MSI, and in November he was promoted to head coach. In his head coach debut season in 2018, the team suffered its first five-game losing streak since its founding.
In 2019, he won the LCK for the first time as head coach. His contract with SK Telecom T1 ended in November, and he married in December. In 2020, he moved from head coach of China’s Vici Gaming to head coach of Damwon Gaming.
In 2021, he won the LCK Spring and Summer splits with DWG KIA but finished runner-up at the MSI and Worlds, and at year’s end he moved to athletic director. He led the team as athletic director through 2022 and then left.
In 2023, he coached the League of Legends national team to gold at the Hangzhou Asian Games, and in November he returned as T1 head coach.
In 2024, in his first year back, he won Worlds and became the first coach with four Worlds titles. In 2025, he led T1 to a third straight Worlds title, his fifth as a coach. In 2026, he stepped away from the team for a while for personal reasons.
Kkoma (born Dec 23, 1985) began his coaching career on Dec 13, 2012, the year he turned 27, as analysis coach of SK Telecom T1, and became known when he won the Season 3 World Championship on Oct 5, 2013, the year he turned 28. In 2025, the year he turned 40, he won his fifth Worlds title as a coach.
Ages are by calendar year (the year minus the birth year), birthdays aside.