derani was gaining on barbosa when the first full course caution period of the race was activated for 14 minutes. james french in the no. 38 performance tech oreca had stopped on the oval banking at turn seven halfway through the third hour because of no fuel. barbosa kept first from derani at the restart. two jackie chan cars separated the pair allowing barbosa to draw clear and re-establish his advantage upfront, which grew to seven seconds. derani fell out of contention in the battle for the lead soon after his right-rear tire burst, shredding the right-rear quarter of his car and sending him to pit road for repairs. matt mcmurry in the no. 90 spirit of race car was demoted to third when hunter-reay's no. 10 wayne taylor entry, simon pagenaud's no. 6 penske, and middleton's no. 31 whelen engineering car got past him the lap after the restart. middleton came into contact with pagenaud at turn five; in spite of both remaining on the lead lap, middleton earned a drive-through penalty. as night fell, james calado's no. 62 risi car, and nunez' no. 77 mazda, picked up punctures at the rear of their cars within 28 minutes of each other.