Over the past few days HuskerOnline.com has been breaking down the different position groups and biggest storylines heading into the 2017 season.

We wrap up our Fall Camp Preview series today by taking a look at Nebraska's secondary, a group still facing more major questions than arguably any other position on the roster entering camp.

Fall Camp Previews: QB | RB/FB | WR/TE | OL | DL | LB

This offseason has been a rough one for Nebraska's secondary, as it saw two big pieces go down with significant injuries in senior cornerback Chris Jones and sophomore safety JoJo Domann.

On top of that, we still don't know what NU's decision will be on any potential discipline for junior safety Antonio Reed, who was involved in an arrest in Florida this spring.

This has left the Huskers somewhat scrambling to figure out a plan going into into the start of fall camp. Do they move senior Joshua Kalu, who switched to safety and thrived this spring, back to cornerback to replace Jones?

Or do they let junior Eric Lee, who struggled his first two years but made a big jump in spring ball, elevate into the starting lineup at cornerback?

Regardless of what happens with Kalu or Lee, there's also the question of whether sophomore Lamar Jackson is ready to take the next step at the other corner position? No matter who lines up opposite of him, Jackson will likely be tested early and often this year.

Then there's the matter of if Kalu does go back to corner, will senior Kieron Williams be able to get back to the form he had last year when he led NU with five interceptions? Williams seemed to struggle with the move to Bob Diaco's defense, but he might have to figure it out in a hurry if called upon.

You could really pick any of the several pressing questions listed above, but most would agree that the biggest domino that needs to fall is what Nebraska wants to do with Kalu.

A former two-year starter at cornerback, the Huskers would know what they're getting from him at cornerback and give a veteran presence at the position to balance out Jackson's relative inexperience.

However, the coaching staff has made it clear that they absolutely love Kalu's potential at safety.

A long, speedy athlete who's best defensive attribute is probably his tackling, the Houston, Texas, native instantly took to the position - one he played in high school - this spring and immediately began working with the first-team defense.

You get the sense that head coach Mike Riley and Diaco are hoping that someone like Lee can elevate his game enough this spring to earn the starting cornerback job and allow Kalu to stay at safety.

If Lee doesn't, though, NU's hand might be forced to move Kalu back and hope Kieron Williams is can pick his play up as a No. 1 safety.

By the end of last season it was looking as if Lee might never find his place in Nebraska's secondary.

A former four-star recruit ranked the No. 1 player in the state of Colorado, Lee enrolled early for the spring of 2015 and looked to be well on his way to becoming a big factor for the Huskers.

But he ended up redshirting his first season and then only saw time in eight games, primarily on special teams, last year.

With NU's move to a 3-4 and a change in philosophy in the secondary, though, Lee looked like a different player this past spring. He all but locked himself in as the No. 1 nickel back entering fall camp, and now he's got a chance to be a starting corner depending on how things shake out.

Can Lee keep up his resurgence during camp? Nebraska's coaching staff might be counting on it.

When all the drama finally unfolded with the sudden departure of incoming freshman cornerback Elijah Blades, Nebraska ended up not adding a single defensive back to the roster in its 2017 class.

The good news is the Huskers do return a handful of redshirt freshmen who have a shot at making their way into the secondary rotation this year.

Bootle has the best shot chance to see the field at corner, but safeties Tony Butler and Marquel Dismuke showed flashes this spring and could see their roles increase depending on what happens with Kalu.

CB

1 - Lamar Jackson, So.

2 - Boaz Joseph, Sr.

3- Avery Anderson, So.

CB

1 - Eric Lee, So.

2 - Dicaprio Bootle, RFr.

S

1 - Joshua Kalu, Sr.

2 - Antonio Reed, Jr.

3 - Tony Butler, RFr.

S

1 - Aaron Williams, Jr.

2 - Kieron Williams, Sr.

3 - Marquel Dismuke, RFr.