Why Seneca? Does Seattle have a choice?
Matt Hasselbeck has entered that agonizing phase of his career where injuries are around every hit. Seattle could sign Jason Campbell, but maybe they can't. Campbell is a restricted free agent in an uncapped season. If the NFL hashes out that problem and Campbell becomes an unrestricted free agent, there's still no certainty he signs with Seattle or Seattle signs him. Seattle could draft a quarterback, but developing a quarterback is a lengthy process. One reason Detroit selected Matthew Stafford is that should Stafford develop, he will be entering his prime just as the Lions are finishing their rebuild.
Wallace, for all his flaws, is learning the Greg Knapp system, has game experience in the Knapp system, is developed or as developed as he'll be (and a good bit better than Stafford or Mark Sanchez) and has a certain floor. Wallace has a certain expected minimum performance.
Why Seneca? Because like it or lump it, Seneca Wallace might be the best quarterback available in 2010.
A player like C.J. Spiller adds new dimensions to the offense and reduces Wallace's burden. It won't work if Spiller is regularly fighting his way out of the backfield. That means Seattle needs to add primetime talent to their line. It doesn't need a full rebuild of its line, but it does need better, healthier depth and another premium talent to play alongside Chris Spencer. Adding a left tackle improves depth, improves the right tackle position, where Sean Locklear can play, and actually saves the team some scratch.
It's a lucky coincidence that what Seattle needs to run the ball is exactly what Wallace needs to protect himself from himself. The infinity drops won't stop, but a long limbed, natural left tackle that can mirror his man and continue to control the edge all the way through the back end can help shield Wallace's abysmal pocket presence. We're not talking a road grader. Seattle will be in the market for a Charles Brown, Selvish Capers type. Someone that can kick out, cut and has the foot speed to keep up with our loony tunes signal caller.
Adding a tackle is a start, but Seattle needs to improve its depth and specifically, depth that can excel in Knapp's system. The Seahawks should pursue Daryn Colledge, Marshal Yanda, Chris Kuper or even someone like Khalif Barnes and Alex Barron, two players that have flunked out at tackle but could improve as guards.
The idea is to turn Seneca Wallace into a David Garrard by improving the talent around him and creating a system that is run first, strict, and powered by play action. You do not create the Wallace system because it's ideal, but because it satisfies basic needs and deemphasizes the quarterback. Ideally, the system that can work with Wallace can work with Mike Teel, Zac Robinson, Case Keenum or Tim Tebow, allowing Wallace to be the crash test dummy, and the kid Seattle drafts, the driver. Wallace keeps the team competitive enough to add free agent talent and avoid the high stakes pit of perennial top ten picks. Teams do not win Super Bowls with Seneca Wallace, but Wallace could be Seattle's Jim Harbaugh or Drew Bledsoe.