1. Mario Williams: As I wrote in Tuesday’s defensive line primer, he is a better fit at defensive end. But teams with 3-4 defenses will also toss tons of cash at him, so let's throw him on this list, too. Might the Ravens be one of those teams? I would say it is highly unlikely, but it’s fun to think about the damage Williams and Terrell Suggs could do playing together.
2. Jarret Johnson: Like McClain, Johnson could be a target of the Colts. Rex Ryan and the New York Jets may also try to lure him away from Baltimore. Johnson wants to stay, but he knows his time here could be up. “I love my teammates but I'm not idiot," he recently told our Mike Preston. "I know how this business works.”
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- NFL free agency primer: defensive linemen
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Potential suitors: Baltimore Ravens, Indianapolis Colts, New York Jets.
3. Manny Lawson: Lawson, who spent his first five seasons with the San Francisco 49ers, signed a one-year deal with the Cincinnati Bengals before the 2011 season. He started 15 games on a stout Bengals defense.
Potential suitors: Cincinnati Bengals, Cleveland Browns, Philadelphia Eagles, New York Jets, Chicago Bears.
4. Erin Henderson: In his fourth season in the NFL, Henderson -- a former Terp -- became a starter for the first time. In 15 games (11 starts), he made 70 tackles and forced two fumbles for the Minnesota Vikings.
Potential suitors: Minnesota Vikings, Chicago Bears, Cleveland Browns, Philadelphia Eagles.
5. Leroy Hill: Hill, who has spent his entire career in Seattle, started all 16 games for the first time in his career in 2011. The 29-year-old had 89 tackles, four sacks and a forced fumble for the Seahawks.
Potential suitors: Seattle Seahawks, Chicago Bears, Philadelphia Eagles, Cleveland Browns.