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Kevin Harvick appeared in command and head to the win at Phoenix Raceway when a late-race caution for a spin by Harrison Burton sent all the lead-lap cars to pit road.
The top six, including Byron, took on only two new tires, but Kyle Larson was first off pit road.
Shortly after the restart with three laps remaining, another wreck sent the race into a two-lap overtime. On the ensuing restart, Byron went to the outside of Larson and with a shove from Tyler Reddick, powered into the lead with one lap to go.
Byron then held off Ryan Blaney by 0.330 seconds to secure his second straight NASCAR Cup Series win and sixth of his career.
“Owe the last couple weeks to him,” Byron said of his crew chief, Rudy Fugle. “He’s done a really good job strategy-wise and execution-wise and we’ve done a good job to put ourselves in those positions on the front row with a shot at the end.
“Thanks to everybody back at Hendrick Motorsports, putting together great cars, doing a great job. This is a big credit to them.”
Reddick ended up third, Larson – who led the most laps (201) – was fourth and Harvick rounded out the top-five.
Completing the top-10 were C …