During the second stage of the NASCAR Cup race, the first caution for cause flew on Lap 178 when Shane van Gisbergen spun after contact with Cody Ware. A split strategy saw some of the leaders dive to pit road for fresh rubber, even though the expected tire wear for Sunday's race never came to fruition.
Among those who chose to pit was John Hunter Nemechek in the No. 42 Legacy Motor Club Toyota. However, his team failed to properly secure the left-rear wheel and as he drove out of the stall, the single lug nut quickly fell away. Soon after, the wheel itself separated and began the roll past Nemechek's car.
