John Plummer is a former professional American football player known for his position as a linebacker. He played in the National Football League (NFL) during the 1970s and 1980s, contributing to various teams with his defensive skills and athleticism. Plummer's career highlights include his time with the New York Giants and the New Orleans Saints. After retiring from professional football, Plummer transitioned into coaching and mentoring young athletes. His experience in the NFL has allowed him to share valuable insights about the game, helping to develop the next generation of football players.