Carpenter played the lead in the pilot Lipshitz Saves the World. He has appeared in the movie Sydney White as Lenny, one of the dorks befriended by the title character (Amanda Bynes). He was cast in the television project Held Up, as Ray Pfeiffer and had a recurring role on the Fox television series The Return of Jezebel James as Dash, opposite Lauren Ambrose and Parker Posey. He also starred in the 2009 film I Love You, Beth Cooper, as Rich Munsch.

In 2010, he is slated to star in the CBS sitcom Hitched alongside co-star, Sara Fletcher.