nonconference
adjectiveDefinition of nonconference
: not of, relating to, or occurring within a conference
especially
: of, relating to, or involving play between athletic teams that do not belong to the same conference (as in college football or basketball)
nonconference games/opponents a nonconference victory … facing a brutal nonconference schedule that included away games against Texas, North Carolina, Kansas, Arizona and Kentucky … — Tim Crothers