Here are all the details for the inaugural NASCAR In-Season Challenge, which kicks off Saturday night in Atlanta.

Whether you're a weekly watcher or a casual Cup fan, this guide will get you up to speed on the drivers in the bracket.

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