North Carolina head coach Mack Brown, center, argues a call with the officials during the third quarter of an NCAA college football game against Appalachian State in Chapel Hill, N.C., Saturday, Sept. 21, 2019. (AP Photo/Chris Seward)

Clemson's K'Von Wallace races down the sideline for a touchdown with an interception during the first half of the team's NCAA college football game against Charlotte on Saturday, Sept. 21, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

Clemson coach Dabo Swinney congratulates Joseph Ngata after Ngata scored a touchdown against Charlotte during the second half of an NCAA college football game Saturday, Sept. 21, 2019, in Clemson, S.C. (AP Photo/Richard Shiro)

North Carolina quarterback Sam Howell (7) runs against Appalachian State's Noel Cook (20) and Desmond Franklin (6) during the second quarter of an NCAA college football game in Chapel Hill, N.C., Saturday, Sept. 21, 2019. (AP Photo/Chris Seward)