The 27-year-old native from Norman, Oklahoma, became the 14th different competitor to secure a spot for the 2022 Cup Series Playoffs by winning at the Magic Mile.
The 41-year-old Hamlin from Chesterfield, Virginia, led four times for 15 of 413 over-scheduled laps and outlasted the on-track chaos and two overtime attempts to notch his first 600 triumph at the Queen City.
Stenhouse, Buescher and Suarez claimed respective stage victories while Erik Jones claimed the Fan Vote title to transfer from the All-Star Open to All-Star Race.
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 reigning NASCAR Cup Series champion led four times for 28 of 200 laps and fended off the field in a four-lap shootout to claim his second victory at Auto Club Speedway.