In 1910, representing the Aberdeen YMCA, George Corsar set a new Scottish Road Racing Association 50-mile record, becoming the first man to cover the distance in under two and a half hours, when he clocked 2-27:00. Corsar joined the Peterhead CC in 1911, and was a member of the three-man team (with William Petrie and George Greig) that won the Scottish National 50-mile team title. That same year, he lost his Scottish 50-mile record – to Petrie. Corsar joined the Inverness CC in Olympic year, 1912, and was a non-scoring member of the Scottish team that finished fourth in the Olympic team road race event. After World War I, Corsar took to motor cycle racing.