Denny Hamlin outgunned Martin Truex, Jr. on an overtime restart and held on to win the Toyota Owners 400 at Richmond, earning his second win of the season.
Ryan Blaney passed Aric Almirola for the lead with 22 laps to go and pulled away to win the Xfinity 500 at Martinsville, winning his way into the Championship 4.
"I already had my spot in the Round Of 8 sewed up," Byron said, "so I was out there just enjoying a leisurely Sunday drive. But things always get a lot less leisurely once I park the car for a NASCAR inspection."