Here we have another former star from The Adventures of Pete & Pete who didn't quite manage to make it big as an actor. Known mostly for his role as Big Pete on the show, Mike Maronna only landed fairly minor roles outside of his one regular gig. He played Jeff McCallister in Home Alone and reprised his role in the sequel, Home Alone 2: Lost in New York. He also appeared in an episode of Law & Order, as well as the films, Slackers and 40 Days and 40 Nights.
Maronna decided to take a different career path when acting wasn't really working out for him. He's now an electrician on movie sets, and we'd say his contacts from his acting days have probably come in handy. He even worked on the Sex and the City film, so we think he's doing quite well.