The top four best average lap speeds all came from the first 20-minute session on Saturday with Byron leading the way at 181.317 mph.Tyler Reddick was second overall (180.114 mph) and Bubba Wallace third (180.060 mph). Ty Gibbs led the second 20-minute session but was fourth-best overall (179.062 mph).Prior to the start of the practice sessions, NASCAR announced several penalties for Reddick’s ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/nascar-coke-600-byron-spins-but-leads-practice-reddick-penalized/10615718/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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