GREEN BAY, Wis. -- Between now and when the Green Bay Packers report to training camp on July 25, we will spend considerable time looking at the roster from a variety of angles.

In the days leading up to camp, we will break things down by position group. And before that, we will look at several players who need to give the Packers more than they did last year.

But before we do any of that, let's reset the depth chart as it likely stands heading into training camp. This is an unofficial assessment, but it is based on observations during organized team activities and minicamp practices combined with interviews with assistant coaches and scouts.

First up is the offense:

Quarterbacks: Aaron Rodgers, Matt Flynn, Scott Tolzien, Chase Rettig.

Notes: Expect a legitimate battle for the No. 2 job between Flynn and Tolzien in the preseason. Coach Mike McCarthy noted several times how much Tolzien improved thanks to a full offseason with the Packers. The biggest question here is whether the Packers will keep three quarterbacks rather than only two. Rettig looks like a camp arm, at best.

Running backs: Eddie Lacy, James Starks, DuJuan Harris, Michael Hill, Rajion Neal, LaDarius Perkins.

Notes: The loss of Johnathan Franklin to a career-ending neck injury struck a blow to what appeared to be a deep position. But it also sorted out things somewhat, although Harris still needs to show that he can be productive like he was late in the 2012 season. The knee injury that cost him all of last season does not appear to be an issue. Neal and Perkins, a pair of undrafted rookies, both are slashing backs similar to Harris with Perkins (5-foot-7, 195 pounds) also being similar in stature.

Fullbacks: John Kuhn, Ina Liaina.

Notes: There's no reason to think the veteran Kuhn won't be around for another season.

Receivers: Outside -- Jordy Nelson, Jarrett Boykin, Davante Adams, Jeff Janis, Kevin Dorsey, Chris Harper. Slot -- Randall Cobb, Jared Abbrederis, Myles White, Alex Gillett.

Notes: Adams, the rookie from Fresno State, may eventually supplant Boykin, but he will have to catch the ball more cleanly than he did in the offseason. He battled drop issues at times during the OTAs and minicamp. Fellow rookie Janis showed up regularly during team periods. Harper was off to a strong start until a hamstring injury knocked him out. In the slot, Abbrederis looks like a natural fit. White bulked up after contributing some as a rookie last season and should not be ignored.

Tight ends: Richard Rodgers, Andrew Quarless, Brandon Bostick, Ryan Taylor, Jake Stoneburner, Colt Lyerla, Justin Perillo.

Notes: Even if Quarless is healthy for the start of camp, Rodgers might still have the edge for the starting job after a strong offseason. He's more dynamic as a receiver than Quarless, who missed the entire offseason because of an undisclosed injury. Bostick came back late in the offseason from foot surgery. While there are high expectations for Lyerla, the undrafted rookie did not flash often enough during offseason practices.

Tackles: Right side -- Bryan Bulaga, Don Barclay, Aaron Adams, John Fullington. Left side -- David Bakhtiari, Derek Sherrod, Jeremy Vujnovich.

Notes: Bulaga practiced with a large brace on his surgically repaired left knee and has something to prove after missing all of last season, but the fact that he's back at right tackle shows how much the Packers believe in Bakhtiari on the left side. Sherrod made it through the full offseason program for the first time, which is something of an accomplishment considering his injury history. But he's running out of time to show he can play like the first-round pick that he was in 2011. Barclay, who started 18 regular-season games the last two seasons, has split his time between right tackle and guard and looks like the No. 6 offensive lineman.

Guard: Right side -- T.J. Lang, Barclay, Lane Taylor. Left side -- Josh Sitton, Barclay, Andrew Tiller, Jordan McCray.

Notes: Barclay likely would be the top back up at both guard spots, although Taylor worked at right guard with the No. 2 offensive line while Barclay played right tackle or left guard.

Center: JC Tretter, Garth Gerhart, Corey Linsley.

Notes: Tretter took all the snaps with the number one offensive line this offseason. It is his job to lose, but his lack of experience makes him something short of a sure thing. Gerhart worked ahead of Linsley, a fifth-round pick, but if anyone is going to challenge Tretter it might be Linsley.