The Los Gatos, California, native recorded the first NASCAR Cup Series victory for Kaulig Racing in the series' inaugural event at the Indianapolis Road Course.
The 18-year-old rookie from Charlotte, North Carolina, fended off late challenges from AJ Allmendinger and Austin Cindric to notch his third Xfinity career victory at The Glen.
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.