Christian Keener "Red" Cagle was an American professional football player in the National Football League (NFL). He was a three-time All-American playing college football for the Army Black Knights A star halfback, Cagle's prominence landed him on the cover of Time magazine in 1929.

The Army Black Knights football team, historically known as the Army Cadets, represents the United States Military Academy in college football. Army is a Division I Football Bowl Subdivision (FBS) member of the National Collegiate Athletic Association (NCAA). The Black Knights play home games in Michie Stadium with a capacity of 38,000 at West Point, New York. The Black Knights are coached by Jeff Monken, who has held the position since 2014. Army claims three national championships from 1944 to 1946. In addition, major selectors have awarded Army championships in 1914 and 1916. Army has produced 24 players and four coaches in the College Football Hall of Fame, 37 consensus All-Americans, and three Heisman Trophy winners.