Once again, No. 4 Clemson not allowing many yards or points

Clemson head coach Dabo Swinney, left, argues with a game official during the first half of an NCAA college football game against Louisville in Louisville, Ky., Saturday, Oct. 19, 2019. (AP Photo/Timothy D. Easley)

Clemson linebacker Chad Smith (43) grabs Louisville quarterback Evan Conley (6) during the first half of an NCAA college football game in Louisville, Ky., Saturday, Oct. 19, 2019. (AP Photo/Timothy D. Easley)

Clemson defensive tackle Nyles Pinckney (44) makes an interception away from the defense of Louisville offensive lineman Mekhi Becton (73) during the first half of an NCAA college football game in Louisville, Ky., Saturday, Oct. 19, 2019. (AP Photo/Timothy D. Easley)