Two laps later, the pits were open and that is when drivers started changing to the rain tires. During that stop, Conway was given a drive-though penalty for a pit lane safety violation.
The remaining portions of the race would see its share of caution periods for debris and other incidents on the course forcing IndyCar officials to make it a timed race of 80 minutes.
Power was about to dive down pit lane and had committed to coming down for a stop before diving back onto the course to keep from being penalized for pitting while the pits were closed on lap 43.
One lap later, the pits were open and Power led the field down pit lane to change back to the racing slicks. Justin Wilson was on the only driver who did not pit as he stayed on the course on the rain tires. That created the unlikely scenario of Wilson, Josef Newgarden, Carlos Huertas, Luca Filippi and Mike Conway in front when the green flag waved with 9 minutes, 23 seconds left in the race.
With most of the field on racing slicks and the drivers up front still on the treaded tires it created an intriguing battle as Wilson began to pull away. But Conway was able to reel him in and passed Wilson for the lead with 7:35 left.
There were 6 minutes and 38 seconds left in the race when a massive multi-car crash at the end of Lakeshore Boulevard that involved championship contender Ryan Hunter-Reay, Ryan Briscoe, Carlos Huertas, Marco Andretti and Carlos Munoz brought out a full-course caution with time winding down.
Conway was the leader ahead of Wilson, Kanaan, Power and Newgarden.
The race was red flagged to clean up the race course with the stoppage not counting against the time on the clock.
After the track was cleaned up the cars were refired with less than four minutes remaining. The green flag waved with 2 minutes, 27 seconds left and Castroneves’ car had wing damage as it dropped through the field. Conway began to pull away with Kanaan passing Wilson for second place. He had two laps left to try to get up to Conway for the victory.