The Buffalo Bills have a very noticeable hole on their offensive line at left guard after their top two players at the position - Andy Levitre (Tennessee Titans) and Chad Rinehart (San Diego Chargers) - departed via free agency this week.

While we mull which remaining free agents and/or 2013 NFL Draft prospects the team may pursue to fill the void, it's important to note that the team does have in-house candidates for the position. Granted, none of them are remotely of the ilk of the departed Levitre, but two of them already have some experience playing the position in Buffalo.

Colin Brown (6'7", 326): Re-signed to a two-year contract earlier this off-season, Brown has seen some playing time in recent seasons - in 2011 as a center late in the season, and then again as a backup right guard in 2012 before a hamstring injury ended his season. Right now, he's the team's most tenured and best option at left guard.

Sam Young (6'8", 316): A right tackle by trade, Young saw some work at right guard and right tackle last season, finishing the season on the edge after Erik Pears and Chris Hairston both landed on IR. A very limited athlete, Young makes up for it with smarts. He's more of a backup-type, but a move inside to guard could actually lengthen his career, considering the fact that he's so overmatched at tackle.