Otto "Proc" Klum (October 17, 1892 – September 24, 1944) was an American football and basketball coach. He served as the head football coach at the University of Hawaii from 1921 to 1939. Klum is the most successful coach in Hawaii football history having compiled a career record of 84–51–7. His 1925 team went 10–0. Klum was also the head basketball coach at Hawaii for two seasons from 1921 to 1923, tallying a mark of 13–8. Klum was notorious for running up the score. In the 1926 season, his team scored more than 100 points twice. His teams also scored more than 80 points in two other games in 1923 and 1925.