PITTSBURGH — The warm-up portion of No. 21 Pittsburgh’s schedule is over and coach Pat Narduzzi knows it.

The evidence jumped off his television screen while Narduzzi watched No. 24 Louisville’s loss to No. 12 Miami a week ago, a game that was more track meet than slugfest. The Cardinals rolled up more than 500 yards, moving the ball with the kind of ease that’s become the program’s signature under second-year coach Scott Satterfield.

“You notice their speed,” Narduzzi said of the Cardinals. “When I’m watching them, they’re fast, their O-line is aggressive. They’re very aggressive.”

The Panthers (2-0, 1-0). host Louisville at noon Saturday at Heinz Field.