From Longman Dictionary of Contemporary Englishsluggerslug‧ger /ˈslʌɡə $ -ər/ noun [countable] American English informal DSBa baseball player who hits the ball a very long way
Examples from the Corpus
slugger• He is still considering whether to sign free agent slugger Darryl Strawberry.• The Big Hurt already looks the part of a legendary slugger.• But the Orioles slugger faces an important physical this morning.• It might seem logical to build around Sosa, a veteran slugger to complement all the prospects. 