Denny Hamlin started on pole at Charlotte, but faded quickly and was not much of a factor until a big wreck on an overtime restart left Hamlin with the lead. Hamlin battled Kyle Busch in the second overtime and edged his teammate by 0.014 seconds.
The 28-year-old Blaney from High Point, North Carolina, survived an overtime shootout against Denny Hamlin to cash in a million dollars for the first time in his career at the Lone Star state.
Kurt Busch, the 2004 Cup Series champion from Las Vegas, Nevada, led a race-high 116 of 267 to notch his first victory in the Heartland State and his first driving for 23XI Racing.
With two laps to go, Joey Logano used his bumper to move leader William Byron out of his way, take over the lead and cruise to his first win of the season in the Goodyear 400 at Darlington Raceway.
The 29-year-old Chastain from Alva, Florida, rallied from an early pit road speeding penalty to overtake Erik Jones on the final lap through the tri-oval to claim his second career win in NASCAR's premier series.