When he was 16, Baio was cast as The Fonz's cousin Chachi Arcola on "Happy Days". During his time on "Happy Days", Baio earned two Emmy Award nominations, for his lead performances in the television movies "Stoned" (1981) and "All the Kids Do It" (1985). He won two Young Artist Awards during the Third Annual Youth in Film Awards (1980–1982) as Best Young Actor in a Television Special for "Stoned" and Best Young Comedian in Television or Motion Pictures for "Happy Days". He also starred in the made-for-television youth drama specials "The Boy Who Drank Too Much" and "Senior Trip".