The 24-year-old Gragson from Las Vegas, Nevada, led a race-high 43 of 90 laps, including the final 21, to record his third Xfinity victory of 2022 at the Tricky Triangle.
The 20-year-old Smith from Talking Rock, Georgia, led all but 11 of 60 laps en route to his second victory of the 2022 Truck season at the Tricky Triangle.
The Tucson, Arizona, native capitalized on teammate Kyle Larson's last-lap misfortune to claim his third victory of 2021 at the Tricky Triangle circuit.