SONOMA, Calif. (Sept. 13, 2017) – Golden State Warriors All-Star Klay Thompson has been named Grand Marshal of the GoPro Grand Prix of Sonoma Verizon IndyCar Series season finale at Sonoma Raceway, Sept. 15-17. Thompson, a shooting guard for the reigning NBA Champions, was selected in the first round of the 2011 NBA draft by Golden State with the…

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