A driver worn Arrow McLaren number 7 IndyCar hat signed by Alexander Rossi. An authentic race worn cap for Arrow McLaren anDiscover the history of American open-wheel racing through the IndyCar Crew Shirts & Jackets collection from HOF Collection. This curated selection features authentic driver-worn, team-issued, personally worn and signed racing apparel connected to iconic IndyCar drivers, teams and Indianapolis 500 moments.d IndyCar fans of the driver.