The 22-year-old Herta from Valencia, Santa Clarita, California, led three times for a race-high 50 of 75 laps to claim his first IndyCar victory of the season at Indy's road course amid slick conditions,
The two-time IndyCar Series champion executed a bold final lap pass over teammate Scott McLaughlin to record the 600th overall motorsports victory for Team Penske at the Lone Star state.
Felix Rosenqvist chased down rookie Pato O'Ward in the remaining laps of the REV Group Grand Prix in Race No. 2 at Road America for his first career IndyCar win.