Bush played most of his career for Cardiff RFC making 171 appearances and scoring 66 tries between 1899 and 1913. He captained the club for three seasons. He won eight caps for Wales, including for the famous Match of the Century, the 1905victory over New Zealand. He also played in four tests for the 1904 British Isles on their tour to Australia and New Zealand. This was before he had been capped by Wales. He was the undoubted star of the tour, being dubbed 'Will o' the Wisp' by the Australian press for his devastating play.