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.
In September 2015, Team Dragon Knights rebranded as Team Arena Online. However, in December, the team changed its name back to "Team Dragon Knights" because Riot Games wanted to see their new title sponsor deliver on promises to create a $1 million tournament circuit in the 2016 season before allowing a team to use their name in competition. The same day as their renaming, TDK received a competitive ruling: Co-owner Chris Shim was banned for the entire 2015 season, TDK itself was fined $10,000, and Ninja was suspended for two months after an attempted poaching of Samsung AD carry Fury.
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.
December 18th, Team Arena Online renames to Team Dragon Knights.Chris Shim is ineligible to have any official position for any team in 2016, TDK is fined $10,000 and has to replace or resell Shim's stake in the team's ownership. Ninja is suspended until March 11th, 2016.