After failing to bring back Benn Grubbs or sign Evan Mathis, the Ravens have a huge need at left guard. John Harbaugh has stated that he believes Jah Reid could end up the starter there next season, but currently Reid is a right tackle. He's also 6'7", which isn't really an ideal height on the interior line.
While there may be a couple of guys out there in free agency who could be the answer, Ozzie Newsome will probably look to the draft to fill the position.
Peter Konz is a very intriguing prospect for the Ravens at Pick 29. He could be an immediate starter at left guard next season and take over for Matt Birk at center after he retires.
Konz seemed liked a lock to the Packers at 28, but they recently signed Jeff Saturday. Saturday is 37, but may be able to act as a bandaid at center so the Packers can address other needs early on this year. If there's still a pass rusher or defensive end on the board that the Packers like at 28, expect them to do just that.
Other teams to watch for: Tennessee, Detroit, Green Bay