Park began his Overwatch career with Korean team GC Busan in April 2017. The team competed in OGN's APEX Season 4, a premier Overwatch tournament series in South Korea. After defeating Cloud 9 KongDoo in the semifinals, they were set to take on RunAway in the best-of-seven finals. Park amassed 134 kills, 44 more than any other player, to only 55 deaths in the series, and led his team to a close 4–3 victory to win the championship. He was named the APEX Finals most valuable player for his performance throughout the series. He picked up another major championship after GC Busan defeated RunAway in the 2017 APAC Premier finals in China.
London Spitfire
Park, along with the entire GC Busan roster, signed with Cloud9's Overwatch League team London Spitfire in November 2017. Within the first two weeks of the 2018 season, Park was fined for giving the finger to his face camera during a league match; although he claimed that it was in response to a joke that was made off-camera by his team backstage, he publicly apologized for the gesture. The team found early success, reaching the Stage 1 Finals. In as 3–2 win over the New York Excelsior in the finals, Park participated in 38.2 percent of his team's kills, better than any other player in the Stage 1 Playoffs. At the end of the 2018 regular season, Park was the highest-rated DPS player across all heroes. The Spitfire defeated the Los Angeles Gladiators and Los Angeles Valiant in the quarterfinals and semifinals, respectively, of the 2018 season playoffs; Park averaged 8,790 damage per 10 minutes in those two matches, second to Philadelphia Fusion's Josh "Eqo" Corona for all players in the playoffs. The Spitfire played the Fusion in the 2018 Grand Finals. In 3–1 and 3–0 victories over the Fusion, Park performed exceptionally well, most notably securing five final blows playing Tracer in the final 93 seconds on Volskaya Industries to secure a 1–0 lead in the best-of-three series. With numerous highlight-level plays throughout the series, Park was named the Grand Finals Most Valuable Player. As a member of the inaugural season champions, the Spitfire retired Park's number 13 jersey on January 15, 2020.
Seoul Dynasty
On October 22, 2019, the Spitfire agreed to transfer Park, along with teammate Hong "Gesture" Jae-hee, to the Seoul Dynasty.
