SONOMA, Calif. (Sept. 7, 2017) – Team Penske teammates Helio Castroneves, Josef Newgarden, Simon Pagenaud and Will Power completed a one-day test session at Sonoma Raceway on Thursday to prepare for the Verizon IndyCar Series championship race weekend at the GoPro Grand Prix of Sonoma, Sept. 15-17. This marks a particularly important test session for…