Penn State head coach Bill O'Brien released the team's post-spring depth chart on Thursday, which shows a few key position battles on tap when preseason practice begins in August. You can see the entire depth chart here.

O'Brien is clearly not ready to hand the starting quarterback job to junior college transfer Tyler Ferguson, who had the edge in spring practice. The first-string quarterback spot lists Ferguson OR incoming true freshman Christian Hackenberg, who will be given a chance to win the role in August.

The secondary also contains some battles, as fifth-year senior Malcolm Willis and redshirt junior Ryan Keiser are listed as tied for one of the starting safety jobs, while sophomores Trevor Williams and Jordan Lucas are co-starters for now at one of the cornerback spots. Keiser is a former walk-on who earned a scholarship just before spring ball began.

Adrian Amos, who started every game at cornerback last year, is now listed as a starter at safety. He played some there this spring in anticipation of a possible position switch. Amos is ahead of last year's starter, Stephen Obeng-Agyapong, who has been dealing with a shoulder injury.

Junior Kyle Baublitz is ahead in the race to replace Jordan Hill at defensive tackle, with redshirt freshmen Austin Johnson and Brian Gaia behind him.

Also interesting: starting middle linebacker Glenn Carson is listed as the team's No. 1 long-snapper. Penn State players might have to become more versatile with reduced scholarship numbers.

Here's what O'Brien had to say in the official team release:

"We felt like it was a productive spring. We were able to accomplish a lot at all three areas. We felt like some of the younger players on our team were really improved. When we met with the players (after spring practice), I think they appreciate us sitting down with them and tell them one-on-one what their role is on the team and how they can change that role. We have a very good feeling about our team this summer."