Elliott started 34th after failing to post a qualifying time, but methodically worked his way into the lead, passing Matt DiBenedetto on Lap 38, and then overtaking Kyle Busch with 17 to go.
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.
Kyle Busch scored his 100th NASCAR Xfinity Series victory Saturday at Nashville Superspeedway holding on through three late-race restarts to bring his Joe Gibbs Racing No. 54 Toyota to victory lane.