light heavyweight
From Longman Dictionary of Contemporary EnglishRelated topics: Other sportslight heavyweightˌlight ˈheavyweight noun [countable] DSOa boxer who weighs less than 79.38 kilograms, and who is heavier than a middleweight but lighter than a cruiserweightExamples from the Corpuslight heavyweight• Last week in New York, he stopped respectable light heavyweight Merqui Sosa in only two rounds.