[4][5][6] Dennis Baddeley was born in Castleford, West Riding of Yorkshire, his birth was registered in Pontefract district, and he died aged 85.
Dennis Baddeley was selected for Yorkshire County XIII whilst at Wakefield Trinity during the 1945/46 season.
[7] Dennis Baddeley played on the wing in Wakefield Trinity's 13–12 victory over Wigan in the 1946 Challenge Cup Final during the 1945–46 season at Wembley Stadium, London on Saturday 4 May 1946, in front of a crowd of 54,730.
[8] Dennis Baddeley played on the wing in Wakefield Trinity's 2–5 defeat by Bradford Northern in the 1945 Yorkshire Cup Final during the 1945–46 season at Thrum Hall, Halifax on Saturday 3 November 1945, and played on the wing in the 10–0 victory over Hull F.C.
Born in Castleford, he signed for Wakefield Trinity in 1943 after some successful work with Glass Houghton Intermediates.