David "Dai" Rees (birth unknown – death unknown) was a Welsh rugby union and professional rugby league footballer who played in the 1900s and 1910s. He played club level rugby union (RU) for Penygraig RFC, and representative level rugby league (RL) for Wales, and at club level for Salford, as a forward (prior to the specialist positions of; prop, hooker, second-row, loose forward), during the era of contested scrums.