The race featured a track record seven cautions,[14] four of which came in turn 7.[10] Meanwhile, Scott Dixon and Will Power battled throughout the day, but during the final pit stops under caution, Dixon sped out of his pit box and struck Power's right rear tire carrier, sending the carrier into another pit member, while another was injured by an air gun. None of the three were seriously injured, and were treated with ice. As hitting pit crew members and pit equipment results in a penalty, Dixon fell back to 21st and finished 15th. The penalty became controversial after Dixon believed Power's crew member walked in front of Dixon's car intentionally.[14] Dixon eventually called the ruling "pretty annoying"; IndyCar race director Beaux Barfield stated that replays Dixon hadn't seen of the incident showed him driving too close to Power's car, which was getting serviced at the time.[15] As for Power, he led for the remainder of the race, and beat Justin Wilson by 1.2 seconds for his nineteenth career IndyCar victory and first in 25 races, while Dario Franchitti, Marco Andretti and Simon Pagenaud closed out the top five.[16] The win was Power's third at Sonoma in four years, as he continues to be the only IndyCar driver with multiple wins at the track.[17]
Sometime during the later portion of the race, Andretti made contact with Power, which led to a confrontation between Andretti and Power's car owner Roger Penske after the race.[14]
The points standings featured Castroneves increasing his then 31-point lead over Dixon[7] to a 39-point lead (479 points to 440), while Ryan Hunter-Reay (417), Marco Andretti (409), Simon Pagenaud (380) and Dario Franchitti (379) remained as the top six, Justin Wilson and Will Power leapt past James Hinchcliffe and Charlie Kimball for seventh and eight, respectively, dropping Hinchcliffe and Kimball to ninth and tenth.[7][10]
