sinatraa

Won's Overwatch career began with the game's competitive mode; by the third season, he reached the number one spot in the player rankings.[5] Looking to enter the competitive esports scene, Won signed with Selfless Gaming, dropped out of traditional high school in his junior year, and moved to Atlanta to live in the Selfless Gaming house.[3] Playing with popular Overwatch players Daniel "dafran" Francesca and Jeff "emongg" Anderson, the team did find some success; however, they never won a tournament and disbanded in July 2017. Won's performance with the team gained notable attention of the Overwatch community.[5]

With the creation of the Overwatch League in 2017, scouts for the twelve franchises looked to sign the best players around the world to their respective teams. After a bidding war between NRG Esports and Cloud9, Won signed a $150,000-per-year contract – three times the league's minimum salary – with NRG Esports' team San Francisco Shock. The signing reunited Won with his former Selfless Gaming coach Brad "Sephy" Rajani, who was the head coach of NRG Esports' OWL team.[6] However, as he was only 17-year-old at the time, Won would not be eligible to play in league matches until he turned 18.

Won made his Overwatch League debut on March 21, 2018 against the Florida Mayhem. Months without competing in a competitive environment hurt his performance, and he was unable to synergize well with his team; this would significantly contribute to them subsequently losing the match.[7] The team's struggles continued throughout the season, as they finished the season in ninth place out of twelve.[5]

It was not until the 2019 season that Won came into his own. With the meta shifting to a three-tank, three-support composition, Won played as Zarya throughout the majority of the season to significant success. He is often considered the best Zarya player the league has ever seen.[8] Developing as a leader and a team player, Won ended the season leading the league in hero damage per 10 minutes and helped the team claim a second-best 23–5 regular season record, a perfect +28 map differential stage, all three stage finals appearances, and one stage title.[2][9] At the end of the regular season, he was awarded the Role Star commendation for DPS and won the OWL Most Valuable Player award due to his ability to flex onto a multitude of different heroes and hold his own as a championship team member.[9][10]

San Francisco faced the sixth-seeded Atlanta Reign in the first round of the season playoffs, but the team faltered in a heartbreaking 3–4 loss to fall into the losers bracket.[11] The Shock rebounded from the loss by pulling off a dominant run in losers bracket; the team swept the London Spitfire in the first round, the Los Angeles Gladiators in the second round, the Hangzhou Spark in the third round, and the New York Excelsior in the losers finals to secure a spot in the 2019 Grand Finals, where they faced the Vancouver Titans.[12] Won played exceptionally well as Doomfist during the Grand Finals match as he and the team swept the Titans 4–0.[13]

Citing a "lost passion for the game" Won officially announced his retirement from Overwatch in April 2020.[14][15]

The Overwatch League released a commemorative, in-game skin for Zarya on June 16, 2020 in honor of his MVP award for the 2019 Overwatch League Season.[16]

Due to his performance with Selfless Gaming, Won was quickly recognized as one of North America's best DPS players, most notably with his expertise on Tracer, and was voted in as a member of Team USA for the 2017 Overwatch World Cup (OWWC). At the time, the OWWC was the only tournament that pitted players from around the world. The team dominated in the qualifiers and moved on to the single-elimination tournament. Their first match was against the tournament-favorites South Korea; an exceptional performance by Won helped the team to take two maps from South Korea, but they ultimately lost the match and were eliminated from the tournament.[5]

After a disappointing showing in the 2018 Overwatch World Cup, losing early to Team United Kingdom in the Quarterfinals, Won and Team USA came back to the 2019 Overwatch World Cup to sweep the group stages with a 12-0 map record, including beating rivals South Korea. Having secured the first seed, Team USA received a bye in the quarterfinals and faced South Korea in the semifinals. After an intense and back and forth series, Team USA arose victorious, with a 3-1 scoreline with one draw on Horizon Lunar Colony. Team USA then faced Team China in the finals where they won 3–0, winning the United States the gold medal. Won received MVP of the World Cup for his performance on many heroes, including Doomfist, Tracer, Bastion, and Reaper.