He ended his career in 1989 after a season for Fiorentina. He helped the club to a seventh-place finish in Serie A that season, and he scored the decisive goal against his former club in the UEFA Cup playoff match, from a Roberto Baggio assist, which allowed Fiorentina to qualify for the UEFA Cup the following season. Pruzzo is the sole Italian player to have scored 5 goals in a single Serie A match (Roma vs. Avellino, 1986).