Power trailed Team Penske team-mates Josef Newgarden and Scott McLaughlin with 14 laps to go around the 4.014-mile, 14-turn natural terrain road course.
Both Power and McLaughlin were running the less preferred softer alternate compound coming to the final pit stop of the afternoon, while Newgarden was on the ideal harder primary tires. McLaughlin was the first to dive to pit lane on lap 42 of 55, while Newgarden, who was beginning to come up on back marker Nolan Siegel, waited until the next lap to pit.
