In September 2007, Plummer was inducted into the Arizona State Hall of Fame. Later that year, he made a brief appearance in the 2007 Holiday Bowl, when he introduced the ASU players prior to the team playing game. On October 29, 2010, Plummer was honored, along with all Sun Devil Quarterbacks, at a Legends Luncheon hosted by the Arizona State University Alumni Association and Sun Devil Club. Other honorees included Danny White, Andrew Walter, John F. Goodman, and Jeff Van Raaphorst. Plummer has been an assistant football coach at Sandpoint High School since 2009.