During his era as an every - day starter , 1978 through 1991 , he was baseball 's leading home - run hitter , and he 's not in .
Home - run hitter hit 398 homers and not 400 .
During his era as an every - day starter , 1978 through 1991 , he was baseball 's leading home - run hitter , and he 's not in because he hit 398 homers and not 400 .