Justin Allgaier will drive the No. 77 Chevy for Spire Motorsports this weekend at Talladega Superspeedway. This will be Allgaier’s second NASCAR Cup Series start of the 2021 season, as he filled in for Justin Haley in the second race of the Pocono Raceway doubleheader. Earlier in the day, Justin Haley got the wind knocked out of him after wrecking in the Xfinity Serie race, thus Spire called on Allgaier after a top-five run. Allgaier's long time sponsor Brandt will sponsor the No. 77 entry.
Justin Haley who has driven the Spire Motorsports No. 77 a majority of the season will drive for Kaulig Racing in the No. 16 at Talladega.