From Longman Dictionary of Contemporary Englishminor-leagueˌminor-ˈleague adjective [only before noun] 1 connected with the Minor Leagues a minor-league team2 not as important, powerful, or successful as others of the same kind Collins was just a minor-league crook.
Examples from the Corpus
minor-league• The Dodgers on Wednesday assigned nine non-roster invitees to minor-league affiliates.• a minor-league catcher• Because they made a deal with a bail-bondsman to find a minor-league crook suspected of jumping a $ 25,000 bond.• Eric Karros played six innings in a minor-league game Tuesday and was encouraged by his progress.• Eric Karros, slowly rehabilitating his pulled left hamstring, took more than a dozen at-bats in two minor-league games on Wednesday.• The Hansons were played by three young minor-league hockey players.• In six minor-league seasons, he's never hit above.275 or hit more than 15 homers.• He hit at least 24 homers in three different minor-league seasons.From Longman Business Dictionaryminor-leagueˈminor-league adjective [only before a noun] not important or influentialThis is minor-league stuff compared to the profits made by the big toy manufacturers. 