Bruce Kluckhohn-USA TODAY Sports
Left guard Charlie Johnson is the weak link along Minnesota's offensive line.
The future of this unit is much more defined entering 2013 than it was in 2012. All five starters return from last season.
Matt Kalil, 24, has a year of NFL experience and is one for one on Pro Bowl nods. He's on track to become a franchise left tackle and should protect the blindside of Minnesota's quarterback for the next 10-plus seasons, should he choose to stay in Minnesota.
Phil Loadholt, 27, showed further progress in 2012 after regressing in 2010 and 2011 after a strong rookie campaign in 2009. He still is prone to allowing sacks to quicker defensive ends, but he's a force in the running game. He was rewarded with a new contract this offseason reportedly at a value of $5 million per year.
Loadholt and Kalil should combine to form one of the best tackle tandems in the game.
John Sullivan, 27, is one of the game's most underrated centers. He was named to the 2012 Pro Bowl as an alternative, but should have been named initially. He's the leader of the line and has picked up the torch as it was left to him by Matt Birk and Jeff Christy before him.
Guard is where the questions are most pertinent.
Charlie Johnson, 29, should not be a starter for any team, but is slated to reclaim his post at left guard. He's the weakest link of the line. He consistently misses blocks in the run game and in pass protection.
Brandon Fusco, turns 25 on July 26, surprised last season and held onto the right guard job with help from injuries to Geoff Schwartz, who's now with the Kansas City Chiefs. Fusco doesn't standout in pass protection or as a run blocker, but he's adequate at both.
The line is young and talented. It's future is bright and it was a strength of the team last season. It allowed the 11th fewest sacks (32) and fifth fewest quarterback hits (32).
Joe Berger is a very versatile backup, who's capable of subbing at either guard or center.