Newlander's best known for his role as Alan Frog in the 1987 cult classic film The Lost Boys. He also played the part of Anthony in the 1988 remake of The Blob. In 2003, Newlander wrote, directed and starred in an independent film titled Rooster. In 2008 he was to reprise his role as Alan Frog along with Corey Feldman as Edgar Frog in Lost Boys: The Tribe. However, upon DVD release, Newlander's character can only be seen in the alternate ending bonus features of the DVD (and then only momentarily), having not made the movie's final cut. Both he and Corey Haim are however listed in the acting credits for their minor roles.