Team Logo. The Philadelphia Atoms were a team in the North American Soccer League (1968-1984). They won the league in 1973 but never made the playoffs again. They folded in 1976. Retrieved from "https://prosportsteams.fandom.com/wiki/Philadelphia_Atoms?oldid=11584" Categories: NASL (1968-1984) Teams Teams in Pennsylvania Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.