Addabbo made his debut on the small screen in the TV western shooting bettas in The Gunfighters in 1987. Recognition among viewers earned him the role of Jason Craig in the NBC soap opera Generations from 1989 to 1990. He guest starred on a number of television series including Dallas, Dangerous Women, Life Goes On, Cheers, Wings, and Pacific Blue. Addabbo was in several made-for-TV-movies including Calendar Girl, Cop, Killer?: The Bambi Bembenek Story, Love on the Run, and Body Politic. Body Politic was intended to be a television series for The CW. On August 4, 2009, Dawn Ostroff announced that the project was officially dead for the CW. Other soap operas include All My Children, The Bold and the Beautiful, and Guiding Light.