3. Preston Smith
The Packers have invested heavily at edge rusher in recent years. They drafted Lukas Van Ness in the first round this past offseason, and it's only a matter of time before Rashan Gary lands a massive new contract from the Packers.
There are multiple reasons why trading Preston Smith would make sense.
The first is similar to De'Vondre Campbell. Smith turns 31 next month. By moving on, the Packers could give young players like Van Ness and Kingsley Enagbare more opportunities. While the defense may take a step back in the short term, it would accelerate their development by playing more regularly.
The other reason is financial. Smith's cap hit increases by over $10 million next offseason, so there's a good chance he is in his final year with the Packers. If Green Bay plans to move on next spring, why not try to trade him now?
The Packers are unlikely to get anything more than a Day 3 pick for Smith, especially factoring in his contract. Still, a contending team needing some additional pass-rush help could show interest. Smith is a solid starter. He provides sacks, but his run-stopping ability is equally important, which could interest other teams.