An 18-car crash had a huge impact on the inaugural NASCAR In-Season Challenge, collecting the top two seeds and several other contenders in the five-race bracket for $1 million. The wreck appeared to begin shortly after a Lap 69 restart with contact between Denny Hamlin,

Thirty-two drivers, five tracks, one bracket -- and $1 million on the line. The new In-Season Challenge adds a layer to an already unpredictable portion of the Cup Series schedule. Spanning everything from drafting duels at Atlanta to the tight turns of Chicago and Sonoma