The Cowboys were hoping for a right of first refusal clause in the new CBA to protect their interest in Doug Free. Instead, Free is free, and as one offensive line coach said, "That guy is going to be paid." He's only 26 and is coming off his first year as a starter, playing well at left tackle in 2010. He did give up five sacks and had seven false starts last year.

The ex-Falcon is a physical right tackle who plays with a defensive lineman's mentality. Any team interested in improving their running game and bringing attitude to the O-line needs to go after Clabo. The 30-year-old tackle did not have a penalty called against him last year and he hasn't missed a start in three years.

The Bucs want him back. He's a powerful guard who can pass block and serve as a point of attack in the run game. Over the past three years he has only given up six sacks in 39 games.

Another Falcon, Dahl is as intense as Clabo and physical with anyone in front of him. Like Clabo, he was an undrafted player who never lost the chip on his shoulder. He has only given up five sacks in his past 43 starts.

Yanda is versatile, playing tackle or guard, and the Ravens want him back. He did give up six sacks last year, but is considered a fine technician. Blalock is the third Falcons lineman on this list and the team needs to get at least one of these guys back. The 330-pound guard never misses a start and had one penalty and one sack last year.