Maybe the No. 1 question facing the Ravens this season is the status of their offensive line.
Last year, the offensive line was merely average. While they opened up lanes for Ray Rice fairly well, if inconsistently, they struggled with pass protection at times.
The Houston Texans really exposed the Ravens' offensive line in the playoffs, constantly harassing Joe Flacco and shutting down the Ravens' running game.
This year, the O-line will be even weaker, with Ben Grubbs moving on to New Orleans.
With Bryant McKinnie and Matt Birk aging and a new starter at left guard, the Ravens' offensive line looks like a major weakness heading into this season.
If Birk and McKinnie hold up, though, the Ravens could be solid. Kelechi Osemele, Jah Reid and Bobbie Williams should be able to hold the left guard spot down without much of a hitch.
Ultimately, the strength of the offensive line will be determined not by the new guard, but by the play of the tackles. McKinnie and Michael Oher were inconsistent in 2011, and if they don't improve this season, the offense will struggle.
The Ravens are expecting big things from both of them, though, so there is hope that the offensive line will improve. Their improvement will make or break the 2012 season.