Baltimore has alot of players on their defence that will be in free agency.
Suggs, Scott, Lewis, Landry, Leonard, Ivy, Edwards.
Only the first 4 or 5 players can be considered starters for Baltimore. But still that is alot of players they will have to try to give new contracts to. Their defensive co-ordinator has left for the Jets Head-Coach job so that could influence if a player want to stay or leave. There is no way that Baltimore will be able to keep them all.
Suggs is my favourite choice as he will provide much needed pass rush and he has the size to switch from 3-4 to 4-3 in certain plays.
Scott would be a cheaper option to solidify the middle linebackers.
The chances of getting one of these two is very slim. There is no way Lewis will leave Baltimore, you need leaders in the dressing room and Baltimore will keep him simply because of that.
Jim Leonard is the most likely to go. He has performed well this season at strong safety replacing the injured Landry. The biggest knock on him is his size but he has shown he has speed and can move around the pitch quickly and that he can play in a 3-4. If Bigby injury issues is serious and Thompson chooses not to retain him, Leonard would be a good cheap option to replace him. He is a Wisconsin native so its very possible he would jump at the chance to play for Green Bay. Also it could be a good PR move for Thompson if you think about it. The fans love a local guy.