Part six 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 master mechanic and team manager Chuck Sprague.

Sprague’s time at Team Penske from the late 1970s through the late 1990s helped produce countless IndyCar championships and Indy 500 wins.

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