After a tense battle at Martinsville Speedway, William Byron held off Ryan Blaney to advance to the NASCAR Cup Series Championship 4. Watch Byron take the checkered flag and react to earning a third chance at racing for a title. ---------- Subscribe to NASCAR on YouTube: nas.cr/youtube Visit NASCAR.com for the latest news: nas.cr/nascar For more race day in-car cameras check out NASCAR Drive - nascar.com/drive Follow us on discord discord.gg/nascar Shop for your favorite NASCAR gear, diecasts and more: nas.cr/store Download the NASCAR Mobile App: nas.cr/mobile Weekend schedule for on-track action: nas.cr/weekend ---------- Play every weekend! ---------- NASCAR Fantasy Live: nas.cr/fantasy ---------- NASCAR on Social Media ---------- X: x.com/nascar Facebook: facebook.com/NASCAR Instagram: instagram.com/nascar Snapchat: nas.cr/SnapchatAdd TikTok: nas.cr/TikTok GIP...