In their return to racing at Darlington May 17,  NASCAR stressed safety; the races were run with no fans in the stands or practice sessions for the teams prior to racing.  As a result, the drivers and crew members had to dust off the rust quickly and get back to work.

But for half a dozen Cup Series teams, there were a few issues and penalties have been assessed.

On their first day back after a 71 day hiatus, lug nuts became an issue for some of the teams.

In the case of the Joe Gibbs Racing number 20 car driven by Erik Jones, the car was found to have two lug nuts loose during post race inspection.  As a result, crew chief Chris Gayle has been suspended for one race and has been fined $20,000.

There were five other racing teams who were also assessed penalties for lug nut infractions and have had their crew chiefs fined $10,000 each for a single lug nut being loose:
The race winning team, the Stewart-Haas Racing number four car driven by Kevin Harvick with Rodney Childers as crew chief
The Joe Gibbs Racing number eleven driven by Denny Hamlin with Chris Gabehart as crew chief
The Team Penske number 22 car driven by Joey Logano with Paul Wolfe as crew chief
The Chip Ganassi Racing number 42 driven by Matt Kenseth with Chad Johnston as crew chief
and The Leavine Family Racing number 95 driven by Christopher Bell with Jason Ratcliff as crew chief