Mid-Ohio IndyCar: Graham Rahal gains on Juan Pablo Montoya with win

The Rahal Letterman Lanigan driver saw off a brief challenge from Andretti Autosport's Justin Wilson on a restart with seven laps to go, and coasted away to secure the victory.

He picked up an extra point on the final lap for most laps led, bringing him to within just nine points of Juan Pablo Montoya with two races remaining.

"Honestly, for me, other than the Indy 500 this is the biggest race of the year," Rahal said.

"To get this victory at a time when we really needed it ... man, I don't know what to say. This means more than my first win. This is everything."

Wilson held on for second to secure a one-two for Honda, leaving Penske's Simon Pagenaud to round out the podium.

The tone of the race was set by the timing of the yellows. Polesitter Scott Dixon held command during the first stint, only to be short-changed when the second caution period fell right before he was due to make his first stop.

That dropped him back into the pack, but was a huge boost for Montoya and Rahal, who had both made their stops right before the yellow and were cycled up to the front. Dixon would have to settle for fourth.

From there, Montoya maintained control of the middle phase of the race, and was preparing to make his final stop when Ganassi's Sage Karam spun all by himself and brought out another caution.

This time, yellow flags were the last thing that Montoya wanted to see. Rahal and Dixon had already pitted, and he'd just been preparing to come in.

Indeed, both the nature and the timing of Karam's spin have prompted a post-race investigation by IndyCar officials.

The stop under yellows dropped Montoya to the outer fringes of the top 10, and his aversion to risking further damage to his points buffer took the sting out of his defending during the final laps, leaving him 11th.

Further back, a lot of the day's action involved Charlie Kimball, who went into the grass on three separate occasions following contact with Will Power, Ryan Briscoe and Stefano Coletti respectively.

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