RENTON -- The National Football League isn't designed for sustained success.
In the salary-cap era, NFL teams are pushed toward mediocrity, which makes any squad's excellence -- or complete lack thereof -- notable.
Since general manager John Schneider and head coach Pete Carroll arrived in Seattle in 2010, the Seahawks have been among the league's most successful franchises. Much of the credit for that run belongs to the pair, each of whom signed a contract extension with the team over the last week.
Now, with the team's braintrust locked up for the foreseeable future along with its core players, Seattle's Super Bowl window looks like it will remain wide open for the next few years in a testament to the duo's talent -- and to the working relationship they developed from scratch.