Linebackers swarming to the ball and plugging up running lanes; defensive tackles overwhelming interior linemen; two fumbles forced and three recovered; and consistent effort.

In other words, plenty to like in a first-game effort for Nick Holt by his Purdue defense against Louisville last week.

But there were plenty of mistakes, too, and Holt wants his Boilermakers to get those fixed for Friday against an Ohio team that should test Purdue's ability to defend the run.

After Tuesday's practice, the co-defensive coordinator and play caller looked back and looked ahead.