[4][5][6] He also appeared for Wigan as a World War II guest player.
Born in Colchester, Essex, Sadler started his career playing rugby union in the Army.
[10] Edward Sadler won a cap for England while at Oldham in the 13-63 defeat by Australia during the 1933–34 Kangaroo tour of Great Britain match at Stade Pershing, Paris on Sunday 31 December 1933,[3] he also won a cap while at Castleford in 1939 against Wales.
[3] Edward Sadler played in Castleford's victory in the Yorkshire League during the 1938–39 season.
Edward Sadler played loose forward in Castleford's 11–8 victory over Huddersfield in the 1935 Challenge Cup Final during the 1934–35 season at Wembley Stadium, London on Saturday 4 May 1935, in front of a crowd of 39,000.