Career
He competed for Germany because it had annexed Austria at the time of the championships.
He competed for Germany because it had annexed Austria at the time of the championships.
At the 1936 Summer Olympics in Berlin, he won two medals with his partner Rupert Weinstabl: a silver in the C-2 1000 m event and a bronze in the C-2 10000 m event. Proisl also won two medals at the 1938 International Coach Federation Canoe Sprint World Championships in Vaxholm: a gold in the C-2 1000 m event and silver in the C-2 10000 m event.