The 38-year-old Almirola from Tampa, Florida, led 17 of 60 laps, including the final two to claim a second row starting spot for the Great American Race with his second career Duel win.
The 31-year-old Ericsson from Kumla, Sweden, led three times for 13 of 200 laps before fending off Pato O'Ward in a two-lap shootout to claim his first Indy 500 title.
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,
INDIANAPOLIS -- Depart from your seat in front of the podium in the deadline room at the Indianapolis Motor Speedway, take a right turn past the wall with four clocks and blue sound-proofing fabric, exit through the first door down the hall, go down four flights of stairs until you reach the ground, go straight for about 50 feet, and around the corner are two cars covered with tarps. Wait a few minutes and both Verizon IndyCar Series driver Conor Daly and NASCAR XFINITY Grand National Series driver Ryan Reed will uncover the cars to reveal a Lilly Diabetes-sponsored No. 17 Dale Coyne Racing Honda and a Lilly-Diabetes-sponsored Roush Fenway Racing Ford Mustang that Daly will drive at Road America.