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All four Joe Gibbs Racing cars among those going to rear at Talladega

Sean Gardner | Getty Images

TALLADEGA, Ala. -- A total of eight cars will drop to the rear of the field before the start of Sunday's Monster Energy NASCAR Cup Series race at Talladega Superspeedway for unapproved adjustments. An additional car is dropping to the rear for a driver change.

The penalties affect all four Joe Gibbs Racing entries and both Roush Fenway Racing cars among the group of nine. RELATED: Every car in the field | No. 1 car chief ejected | Full Talladega lineup

Those teams will fall to the rear of the 40-car field during pace laps before the start of Sunday's GEICO 500 (2 p.m. ET, FOX, MRN, SiriusXM NASCAR Radio). The total list (presented numerically by car number):

Gaughan's No. 62 will be dropping to the rear because of a driver change. Tyler Reddick went from winning Saturday's Xfinity Series race to qualifying the No. 62 in Gaughan's place. Gaughan was attending his son's first communion and was not at the track Saturday.