[2] Dai Rees was selected for Great Britain while at Halifax for the 1924 Great Britain Lions tour of Australia and New Zealand, he did not play in any of the Test matches on this tour.

[5] Dai Rees won a cap for Glamorgan and Monmouthshire while at Halifax.

Dai Rees played left-second-row in Halifax's 22-8 victory over York in the 1930–31 Challenge Cup Final during the 1930–31 season at Wembley Stadium, London on Saturday 2 May 1931, in front of a crowd of 40,368.

Dai Rees made his début for Haifax on 27 August 1921, and he played his last match for Halifax on 16 January 1932.

Dai Rees is a Halifax Hall Of Fame Inductee.