Cindric was fastest overall with an average speed of 167.698 mph while William Byron ended up second (166.495 mph) but topped all drivers in Group B.<br>Erik Jones was third-fastest (166.483 mph), Tyler Reddick fourth and Martin Truex Jr. completed the top-five.<br>Cindric, Byron and Reddick are among the 16 drivers competing in the Cup Series playoffs.<br>Among those drivers who completed at ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/austin-cindric-fastest-darlington-cup-practice/10363040/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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