While Alex Mack is set to become the most valuable center to reach free agency in years, the picture at guard isn't nearly as pretty. The best of a weak crop might be a journeyman who didn't land a starting job until late last season.
Here's a look at the entire offensive line breakdown entering free agency.
In a class of their own
Are the Ravens trying to depress Monroe's value by intimating that he's not worthy of the franchise tag, even with Dennis Pitta locked up? If Monroe makes it to the open market, he's going to be paid as the best mix of age, talent and well-rounded production available. ... Just 28 years old, Mack has never missed a snap in five seasons with the Browns. He might just be the NFL's premier center.
Veldheer has ideal size, is still young and has a strong record as a blind-side protector. ... Albert has been among the league's premier pass blockers for three years.
Saffold is willing to play left tackle or guard and is capable at both spots. While his versatility is attractive, his medical chart will give interested teams pause. ... Collins has excelled as a pass protector in spot starts over the past half-decade. Why haven't the Bengals considered him starter-caliber until now? ... The Ravens have soured on Oher, who was one of the NFL's weakest run-blocking tackles in 2013.
Starters with questions
Wharton played at a Pro Bowl level last season, but is going on 33 years old and mulling his NFL future. ... Schwartz impressed down the stretch last season as a road-grading run blocker. ... De La Puente and Dietrich-Smith have risen up the center ranks the past two seasons, but their teams aren't going out of their way to re-sign them. ... Howard is no longer a liability at right tackle.
Best of the rest
Chad Rinehart, Wade Smith, Willie Colon, Jonathan Goodwin, Shawn Lauvao, Bryant McKinnie, Marshall Newhouse, Eric Winston, Tony Pashos, Breno Giacomini, Charles Brown, Tyson Clabo, Joe Hawley, Jason Fox, Dennis Roland, Will Svitek, Charlie Johnson, John Jerry, Paul McQuistan, Ryan Wendell, Kevin Boothe, Vladimir Ducasse, Mike McGlynn, Fernando Velasco, J.D. Walton and Brian Waters.
Teams with the biggest need
Match made in heaven: Alex Mack, Indianapolis Colts
Toughest to evaluate: Branden Albert
The Chiefs were willing to franchise-tag Albert as a premier pass protector, but wouldn't sign on for a long-term commitment. The Dolphins were willing to meet Albert's contract demands last offseason, but couldn't reach agreement on compensation with Kansas City. Is there more to the hesitancy than subpar run blocking and last year's rumors of a bad back?
Best bets for a surprising contract: Anthony Collins, Geoff Schwartz
The Bengals never seemed sold on Collins' run blocking, but he didn't allow a single sack in eight starts at left tackle once Andrew Whitworth was moved inside late last season. ... Capable of playing tackle and guard, the 6-foot-6 Schwartz helped pave the way for an improved Chiefs offense that scored 35 points in five of its last seven games.