More spring coverage: Spring game analysis ($) | Spring game notebook | Video: Brohm on spring game

Purdue's second spring under Jeff Brohm is over, and the Boilermakers' head coach could deem it "productive" in a variety of ways.

But Brohm also knows there's plenty of work to be done this summer.

At every position.

Over the next two weeks, GoldandBlack.com will break down each of those groups. The series begins with the defensive line, a unit that didn't have a single returning starter from last season get any significant snaps.