He was captain of the SIAA champion 1902 and 1903 Clemson Tigers football teams coached by Heisman, selected All-Southern the same years.

[2][3] One publication reads "Vetter Sitton and Hope Sadler were the finest ends that Clemson ever had perhaps.

In the "1903 SIAA championship game" against the Cumberland Bulldogs, which opened its season with an upset of Vanderbilt, the winning team was to be awarded the ball.

Some ten minutes of bickering was resolved when the ball was given to patrolman Patrick J. Sweeney, for warning the media and fans to stay down in front and allow spectators to see the game.

[6] Sadler coached the University School for Boys in Stone Mountain, Georgia, in 1904.