Marco Andretti

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Team owner Michael Andretti, left, talks with driver Marco Andretti after a practice session for the IndyCar Detroit Grand Prix auto race on Belle Isle in Detroit, Friday, May 30, 2014. (AP Photo/Dave Frechette)

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Marco Andretti pits during the 98th running of the Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Sunday, May 25, 2014. (AP Photo/R Brent Smith)

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Marco Andretti leads Scott Dixon, of New Zealand, through the first turn during the 98th running of the Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Sunday, May 25, 2014. (AP Photo/Tom Strattman)

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Helio Castroneves, of Brazil, leads JR Hildebrand, center, and Marco Andretti through the first turn during the Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis, Sunday, May 25, 2014. (AP Photo/Tom Strattman)

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In this photo taken on May 11, 2014, car owner Michael Andretti, right, talks with drivers Ryan Hunter-Reay, left, and Marco Andretti during practice for Indianapolis 500 IndyCar auto race at the Indianapolis Motor Speedway in Indianapolis. (AP Photo/Darron Cummings)