In this 1914 photo provided by Indianapolis Motor Speedway, driver Rene Thomas, left, and his riding mechanic, Robert Laly, are shown on a practice day before the fourth running of the Indianapolis 500 auto race at Indianapolis Speedway in Indianapolis, Ind. Europeans dominated the race for the second year in a row with Rene Thomas in a Delage finishing first.
In this 1922 photo provided by Indianapolis Motor Speedway, race driver Jimmy Murphy, seated right, and riding mechanic Ernie Olson pose during a practice day for the 10th Indy 500 auto race at Indianapolis Motor Speedway in Indianapolis, Ind. Murphy, with riding mechanic Olson, won the 1922 race.