Jung "Fixer" Jae-woo, initially known as Ondal, started out his professional League of Legends career as the support for Incredible Miracle 2 for PANDORA.TV Champions Winter 2013-2014. The team failed to make it out of groups and Ondal was benched. He soon renamed himself Fixer and joined KT Rolster in November 2014 as a substitute support player. He played in one BO2 match against CJ Entus in the Champions Spring Preseason.
In February 2015, halfway through SBENU Champions Spring 2015, Hachani requested time off from play, and his request was granted; Fixer became KT Rolster's starting support. KT finished in fifth place and narrowly missed the playoffs. Piccaboo joined the team during SBENU Champions Summer 2015 to share the starting support position with Fixer. KT placed second overall during the regular season of Champions Summer. They made it to the finals of the playoffs but lost 3-0 to SK Telecom T1. KT earned enough circuit points to qualify for the 2015 Season Korea Regional Finals where they beat the Jin Air Green Wings 3-1 in the finals to qualify for the 2015 Season World Championship. Fixer did not play in the playoffs or the regionals.
KT played in the 2015 LoL KeSPA Cup where they lost 2-1 in the semifinals to CJ Entus. Fixer left KT on December 1st.
In July, Fixer joined the North American team Phoenix1. However, he was not part of the team's active roster and did not play.
Fixer remained with Phoenix1 for the 2017 Season. However, Phoenix1 signed two other Korean players, Ryu and Arrow, so residency rules prevented Fixer from playing on the main roster. Despite this obstacle, he was listed as an active substitute.