MORE: Three burning questions facing the Purdue offense this spring | Spring football schedule

Purdue will take the wraps off of spring football practice on Friday.

This is a key spring for the program as Jeff Brohm starts his fifth season in West Lafayette. The Boilermakers are coming off a 2-4 season, their third losing year in succession.

Potential looms for the program, but questions must be answered on both sides of the ball.

Here’s a look at three burning questions facing the defense this spring.