Part 12 of the 15-part feature series ‘How Roger Penske Changed The Indy 500,’ which celebrates the most successful entrant at the Indianapolis Motor Speedway on the 50th anniversary of his first which took place in 1969, is led by former chief mechanic and general manager Derrick Walker.

The Scot's efforts at Team Penske from the late 1970s through the late 1980s helped the program become the most dominant force in IndyCar competition.

Subscribe: https://marshallpruettpodcast.com/subscribe

Join our Facebook Group: https://www.facebook.com/MarshallPruettPodcast