DOVER − The NASCAR Cup Series race at AutoTrader EchoPark Automotive 400 at Dover Motor Speedway was delayed by rain with 14 laps remaining on July 20. The delay lasted 56 minutes as a storm moved quickly through the area. NASCAR officials set a drop-dead time of 8:10 p.m. because Dover doesn't have lights at the racetrack.

Following his final pit stop, Hamlin was left with tires that were several laps older than Joe Gibbs Racing teammate Christopher Bell's, putting him at a disadvantage on grip as Bell began to close in.