The 2020 Philadelphia Fusion season is the third season of the Philadelphia Fusion's existence in the Overwatch League and their first under head coach Kim "KDG" Dong-gun. The team will look to improve upon their 15–13 record from 2019 and return to the playoffs after missing them the previous season. The Fusion will host three homestand weekends in the 2020 season, with the first two taking place at The Met in Philadelphia and the third at the Boardwalk Hall in Atlantic City.
In September 2019, Director of Overwatch Operations Yann "Kirby" Luu, who was also the head coach of the team in 2018, left the team. Less than a month later, both co-head coaches Se-hwi "NamedHwi" Go and Elliot "Hayes" Hayes announced their departures from the team. The team found their replacement on October 25 with the hiring of former Seoul Dynasty head coach Kim "KDG" Dong-gun. Additionally, the team promoted Roston Yoo from team manager to assistant general manager the same day.
The Fusion enter the new season with two free agents, four players which they have the option to retain for another year, and three players under contract. The OWL's deadline to exercise a team option is November 11, after which any players not retained will become a free agent. Free agency officially began on October 7.
The Fusion's first acquisitions of the offseason were announced on October 30. The team traded tank Shin "BERNAR" Se-won and support Kim "Fuze" Tae-hoon from Fusion University to the London Spitfire in exchange for tank Kim "Fury" Jun-ho, signed former Toronto Defiant DPS Lee "Ivy" Seung-hun, acquired support Daniel "FunnyAstro" Hathaway from the Atlanta Reign, and promoted support Kim "Alarm" Kyung-bo from Fusion University. Additionally, the team announced that DPS Josue "Eqo" Corona as part of their roster, although he had been let go from the team earlier in the month. On November 25, the team announced that they had acquired DPS Jeong "Heesu" Hee-su from RunAway, although he would not turn 18, and thus inelegible to play, until late March.
On November 26, the acquisition of DPS Philip "ChipSa" Graham, a popular streamer, was announced. This signing proved to be controversial, as several figures in the professional Overwatch community criticized the signing. Namely, Envy Gaming content creator Justin "Jayne" Conroy noted his lack of professional experience and accused the Fusion of nepotism, as ChipSa's brother Chris "ChrisTFer" Graham works as an assistant coach for the team.
The Fusion's first free agent to depart from the team was support Alberto "neptuNo" González, who had been with the team since its inception in 2017, as the team announced that they had parted ways with him on October 21. The following day, the team elected not to exercise their option to retain DPS Josue "Eqo" Corona, who was also a inaugural season team member. Support Elijah "Elk" Gallagher and DPS Finley "Kyb" Adisi, the final two players that were under team options, were released a day later. Although he was announced as a part of the Fusion's roster in October, DPS Simon "Snillo" Ekström was released from the team on December 19.