The inimitable Brian McIntyre of Yahoo! Sports and several other reputable outlets had a few interesting salary tidbits to share today, and he highlighted players that received base salary increases for the upcoming 2013 season, based on performance or playing time escalators.
First on the list for Seattle is starting LG Paul McQuistan, who sees his scheduled 2013 salary of $2 million increase to $3 million, an escalator that was triggered by McQuistan playing in 97% of the Seahawks' offensive snaps this season, as McIntyre points out. In general, this is not a big deal, but the offensive line becomes a little interesting; Breno Giacomini is scheduled to get a big raise next year (not incentive based, just his contract) and wil represent a $3.75M cap hit, and combined with Max Unger ($5.1M) and Russell Okung ($9M), this Seahawks offensive line unit is by far the most expensive positional group on the offense. That said, it's an important positional group, and the Seahawks have invested a large chunk of their salary cap into the trenches - both DL and OL, which I personally think is smart. Regardless, McQuistan will face some tough competition from James Carpenter, who is the assumed long-term starter at his position, so I would guess the question becomes whether or not McQuistan's veteranosity or depth factor is worth his ~$3M in cap hit.
Also per McIntyre:
Red Bryant goes from $6.5 million to $6.6 million in 2013, Earl Thomas goes from $1.575 million to $2.05 million in 2013, and Max Unger from $4 million to $4.9 million. For Earl and Unger, I'd speculate that perhaps their raises are due to Pro Bowl appearances or All Pro honors, though that's just a guess.