Made up of amateurs:
(Sports) Relating or belonging to a minor league.
Second in quality, rank, etc.; second-class
(Informal) A petty or insignificant person (or people) or thing (or things)
(Slang) Unprofessional, cheap, petty, etc.
Find another word for bush-league. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for bush-league, like: amateur, minor-league, minors, nothing to brag about, second-rate, small potatoes, the bushes, and bush.