NFL salary cap guru Brian McIntyre recently put together an excellent summary of the Seahawks roster situation for Football Outsiders, listing cap space, free agents, restricted free agents, franchise tag candidates, and potential cap casualties the team may have.
Seattle's 16 free agents and three restricted free agents - Atari Bigby, Raheem Brock, Red Bryant, John Carlson, Heath Farwell, Justin Forsett, Anthony Hargrove, David Hawthorne, Leroy Hill, Marshawn Lynch, Matt McCoy, Paul McQuistan, Michael Robinson, David Vobora, Charlie Whitehurst, Jimmy Wilkerson, Mike Gibson, Steven Hauscka, and Roy Lewis - will have a $30-$35 million dollar pie to divide up, per FO. That pie that will be significantly eaten up by the new class of draft picks, Marshawn Lynch, possibly Red Bryant, and a potential big name free agent like Mario Williams or Peyton Manning. The fact of the matter is, a lot of these players have played their last down in Seahawks blue.
McIntyre lists Marcus Trufant and Mike Williams as potential cap casualties - players that have bloated salaries and don't particularly fit in the plan down the line - and points out that Marshawn Lynch is far and away the most likely candidate for the franchise tag. It's a great look at the salary cap situation in NFC West so give it a read.