Béla Blum began rowing with the Pannonia team in the early 1920s. Initially he competed in single sculls and in 1922 he won his first Hungarian championship title in this event. In addition, between 1924 and 1931 he won five Hungarian championships, both in coxed fours and eights. In 1925 Blum won a silver medal with coxed fours at the European Championship. Blum also competed at the Olympic Games in Amsterdam in the same discipline in 1928. In 1931 he won a bronze medal at the European Championship with the coxed eights. He continued to compete in veterans competitions in 1936 and, along with his two teammates, rowed from Regensburg to Mohács, earning the Award of the Hungarian Rowing Association. After the Second War, he worked under the name of Béla Bólya as an actor at the Budapest Opera House.