[1] He is best known for his roles in Four Brothers, Saw II, Land of the Dead, Bad Blood, and Born to be Blue.
[4] He attended the University of Toronto for two years before transferring to the American Academy of Dramatic Arts in New York City where he graduated in 1991.
[5] In the first season of the based on real events[6] crime-drama Bad Blood (2017-2018) Nappo played crime family "soldier" Gio.
[10] Nappo took on the role of Michael in a 2013 run of the play God of Carnage at the Panasonic Theatre.
[11][12] In the 2015 production[13] (plus its 2017 encore run[14]) of Nicolas Billon’s play Butcher, a dark thriller set in a police station in Toronto, Nappo played Inspector Lamb who's trying to unravel the unfolding mystery.