Steve Letarte and Mamba Smith, with support from Russell Wenrich of Racing Insights, dive into the inaugural NASCAR In-Season Challenge — a high-stakes, bracket-style showdown where 32 drivers compete across five iconic tracks: Atlanta, Chicago, Sonoma, Dover, and Indianapolis.

Only one driver will emerge to claim a $1 million prize — and fans can cash in, too. Fill out a perfect bracket at bracketchallenge.NASCAR.com, and you could win $1 million.

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