 During the 1905/06 season Maddock was at the height of his playing abilities, and was finally recognised for his achievements when he was selected to play for Wales in the opening encounter of the 1906 Home Nations Championship.The match was played away to England, and Wales were in formidable form after beating New Zealand in the "Game of the Century".Maddock was the only new cap brought into the Welsh squad, as a replacement for Willie Llewellyn; and he took his place on the wing opposite fellow London Welsh player Teddy Morgan.