John Hadl, American football player and coach
John Willard Hadl (born February 15, 1940) is a former American football player, a quarterback in the American Football League and National Football League for sixteen seasons, with the San Diego Chargers, Los Angeles Rams, Green Bay Packers, and Houston Oilers. He also served as a punter for five seasons. He was an AFL All-Star four times and was selected to two Pro Bowls. Hadl played collegiately at the University of Kansas, and was elected to the College Football Hall of Fame in 1994.