On November 3rd, 2014 it was announced that CompLexity was forming two rosters, coL.White and coL.Black. Kez joined coL.White along with Westrice, Goldenglue, Impactful, and Lohpally, qualifying for the Spring Expansion Tournament via the ranked 5s ladder. After beating Monstar Kittenz 2-1 in the first round, the team lost to Curse Academy 0-2 in the second round of the online portion of the tournament and were eliminated.
After the Expansion Tournament, Kez was going to retire from competitive play.
Instead of retiring, Kez joined Team Dragon Knights in January 2015. They qualified for the spring season of NACS, beating Team Frostbite and Storm in the qualifier. They placed second in the season with a 7-3 record, behind Enemy eSports. In the playoffs, they beat Team Fusion 2-1 before losing to Enemy 1-3, sending them to the Summer Promotion Tournament. Despite the fact that they had placed higher than Fusion, Winterfox chose to play against them. TDK used substitute mid laner Alex Ich in their promotional matches and won 3-1, successfully qualifying for the NA LCS Summer Split.
Due to visa issues, Team Dragon Knights were unable to use their full roster for the first four weeks of the summer split, as Emperor and Ninja were unable to travel to the United States to play with the team. They instead substituted in LattmaN for Emperor and Bischu and mancloud for Ninja; Baby also substituted for Smoothie for their first three games. The substitute rosters went a combined 0-9, but when Emperor and Ninja finally joined the team for the second day of the fifth week, the team defeated first-place Team Dignitas. Despite that initial success, Team Dragon Knights were only able to secure two more victories over the next four weeks, and they finished in last place with a 3-15 record, one game behind Enemy. As a result, they were automatically relegated to the 2016 NA Challenger Series Spring Season.
From September to December 2015, Team Dragon Knights briefly renamed to Team Arena Online; they changed their name back due to concerns from Riot about the title sponsor Arena Online fulfilling their promises to the community regarding a million-dollar tournament circuit. Kez, Seraph, and Ninja stayed with the team through both renamings; however, Ninja was suspended for two months for his role in an attempt to recruit Samsung AD carry Fury while he was under contract.
Despite their roster limitations, TDK finished third in the NACS Regular Season, ahead of Team Liquid Academy and behind Ember. Prior to the playoffs, the team swapped several players with the LCS team Renegades: Alex Ich, RF Legendary, and Flaresz joined TDK while Seraph and Ninja left for Renegades. This roster change appeared to be in Renegades's favor; however, TDK still defeated Ember in the semifinals to advance to the promotion tournament. There they first faced and defeated Team Dignitas in an elimination match before losing to Renegades and then the first-place Challenger team Apex, falling just short of the LCS.
On May 8th, 2016, Riot released a competitive ruling stating that they had investigated the relationship between TDK and Renegades and found an inappropriate link between the two organizations, with the March roster trade and the sources of financial compensation to the players after the trade being one of the major problems. As a result of their findings, Riot ruled that TDK would be banned permanently from Riot-sponsored league play, and Chris Shim and Sean Shim would individually be indefinitely banned from serving in official capacity to an organization involved in official Riot league play. Despite a deadline of May 18th by which they were forced to sell their seed, it wasn't until May 23rd that the seed was announced as sold to Eanix.