The Chelsea F.C. is a soccer team.
Association football , more commonly known as football or soccer , is a team sport played between two teams of eleven players with a spherical ball . Chelsea Football Club ( [ ˈtʃɛlsiː ] ) is an English professional football club based in Fulham , London , that competes in the Premier League , of which they are reigning champions . The Premier League is an English professional league for men 's association football clubs .