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.
The 24-year-old Byron from Charlotte, North Carolina, led a race-high 212 of 403 and fended off Joey Logano during an overtime shootout to repeat as a Cup winner at the Paperclip-shaped short track.
The 24-year-old Byron from Charlotte, North Carolina, led 94 of 200 laps en route to his Truck Series victory in six years at the Paper Clip short track.
The three-time Daytona 500 champion from Chesterfield, Virginia, fended off Kevin Harvick in the final five laps to notch a breakthrough victory at his home track.
The Mitchell, Indiana, native became the 200th different competitor to achieve a win in NASCAR's premier series following his first career victory in the desert state.