Bradley obtained his first cap for Ireland on 13 March 1920 against Wales. In 1924, he toured with a combined British Isles team in South Africa, and although didn't feature in any of the test matches, he played in a total of 13 games against other opposition during the tour. In 1926, Bradley played in all four Ireland matches during the Five Nations tournament where Ireland were joint champions. He also featured during two matches in Ireland's 1927 Five Nations tournament, where Ireland were again joint champions. His final appearance for Ireland came in that tournament against Wales on 12 March 1927.