Career
He began his racing career in 1908 in San Francisco in a borrowed car. He joined the Stutz team in 1912. He was injured for the 1914 season.
Cooper got another late start in 1916 after Stutz pulled out of racing, and he finished fifth in the championship.
Cooper raced in the 1919 Indianapolis 500. Cooper raced in the 1924 Indianapolis 500, and was leading after 400 miles (640 km).
A tire blew, and he had to pit. He returned second, and worked his way back to the lead with 30 miles (48 km) left in the race.
He blew another tire just as he was passing Joe Boyer, and the pit stop forced him to settle for second.
He retired for good in 1928.
