Kwon signed with the Boston Uprising ahead of the Overwatch League (OWL) inaugural season.

In his time with the Shock, he won two Overwatch League championships, in 2019 and 2020, and was named the 2020 Grand Finals' most valuable player.

Prior to the start of Stage 4, Overwatch underwent a balancing update, as well as the introduction of the new hero Brigitte, which significantly reduced Kwon's effectiveness on Tracer.

[4] He also had the most "Fleta Deadlifts," an OWL statistic referring to when a player accounts for more than half of a team's final blows on a map, in the 2018 season at seven.

[13][14] He and the Shock reached the 2020 Grand Finals, where they defeated the Seoul Dynasty by a score of 4–2 on October 10, 2020.

[20] On September 29, 2022, the Shock announced that Kwon had been signed back to the organization for the remainder of the 2022 season.

[23] After the Uprising failed to qualify for the Midseason Madness tournament, Kwon parted ways with the team.