The NFL's salary cap number for 2016 has been set at $155.27M, according to multiple reports, an increase of almost $12 million over last year ($143.28 million).
This news matches a report by NFL Network's Rand Getlin from back on February 15th.
This is generally great news for the Seahawks, who have a large number of free agents that they'd like to keep in Seattle. Left tackle Russell Okung is representing himself and will be looking for a big payday, linebacker Bruce Irvin, cornerback Jeremy Lane, wide receiver Jermaine Kearse, punter Jon Ryan, and defensive tackles Brandon Mebane and Ahtyba Rubin are some valuable cogs in Seattle's system that will head to free agency as well. Backup quarterback Tarvaris Jackson reportedly wants to test the free agency waters, and there are several other key role-player types that the Seahawks would likely want to keep around if the price is right. So, the extra $12 million obviously helps the NFL's other teams as well, but it would give Seattle some extra breathing room to keep guys that want to stay.
The Seahawks are also rolling over a little over $11,000 from 2015, an astronomically low number especially compared to Jacksonville, who is rolling over $32 million. But, for all intents and purposes, the Seahawks cap, put into a big fat round number: $155 million bucks.
More reading on Seattle's cap situation is right here, from Evan Hill.