Hendrick Motorsports and Kaulig Racing were sanctioned L2-level penalties for unapproved modifications pertaining to the hood louvers from their respective vehicles.
William Byron was strong early in the United Rentals Work United 400, winning Stage 1. After falling back from the front late, Byron used a fast two-tire pit stop, and two timely cautions, to win his second consecutive race.
The 25-year-old Byron from Charlotte, North Carolina, led 64 of 317 over-scheduled laps and prevailed in two late-race restarts, including one in overtime, to fend off teammate Kyle Larson and nab second consecutive Cup victory in the desert valley.
The 18-year-old Smith from Johnston, Iowa, led a race-high 92 of 200-scheduled laps and fended off teammate Ryan Truex en route to his first Xfinity career win in his 13th series start.
The NASCAR Cup Series and Xfinity Series head to Phoenix Raceway this weekend while the Camping World Truck Series is off until March 18 at Atlanta Speedway. The ARCA Menards Series will kickstart the racing action with the General Tire 150 at 8 p.m. Friday night.
The 2018 Cup Series champion from Middletown, Connecticut, became the 17th different competitor to achieve multiple championships in NASCAR's premier series by claiming his second Cup title with a dominant victory at Phoenix.
The 20-year-old Gibbs from Charlotte, North Carolina, led a race-high 125 of 200-scheduled laps and persevered in a late battle against rivals Gragson and Allgaier to claim his first Xfinity title by winning the finale at Phoenix.
The 23-year-old Smith from Huntington Beach, California, led a race-high 77 of 154 over-scheduled laps and benefitted during an overtime attempt to achieve his first Truck Series title in his third attempt.
As Justin Allgaier prepares for the 2022 NASCAR Xfinity Series championship race at Phoenix Raceway, he does so with the confidence and experience of a seasoned veteran in the sport.
