John O'Donnell (American football player)

John O'Donnell was an American football player known for his contributions in the early 20th century. He played as a tackle, a position responsible for blocking opponents and protecting the quarterback. O'Donnell was associated with teams in the National Football League (NFL) and was noted for his physical style of play. His career reflects the evolution of football during a time when the sport was growing in popularity and professionalism. While not as famous as modern stars, his involvement in the league contributes to the rich history of American football.