After being seen at a showcase in New York, directed by Peter Sklar, Parrish was offered professional representation and went on to guest star in several television shows. These include CSI: Crime Scene Investigation, Close to Home, Law & Order: Special Victims Unit and Summerland. He appeared in the films Sleepover and RV and The Good Wife. In Freedom Writers, Parrish played Ben Samuels, the only white student in a California high school class. The National Review Online wrote that Parrish had played the role with "unassuming humor".