The reigning Cup Series champion recorded milestone victories for Hendrick Motorsports and Chevrolet with a rain-shortened win at Circuit of the Americas in Austin, Texas.
The 2012 Cup champion overtook Matt DiBenedetto on the final lap and held off the field to claim his first Cup victory of the 2021 season at the world's fastest venues.
The Winamac, Indiana, native stormed to the lead with two laps remaining before notching up another superspeedway victory of this season and keeping his title hopes alive.
The Riverton, Illinois, veteran backed up his first Richmond on Friday night by dominating and winning the second Richmond event on Saturday afternoon, thus carrying extra momentum prior to the Playoffs.
The remaining four competitors currently inside the top-12 cutline have stabilized themselves and have taken another step closer in making this year's Xfinity Playoffs.