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.
The Tucson, Arizona, native spoiled the Playoff battle by claiming his first win at the Paperclip track amid a controversial incident with Denny Hamlin.
