You guys are crazy if you think the Seahawks will just carry 4 RBs. We did it last season because there wasn't anyone worth while to be carried as the 5th.
Seahawks can easily carry:
Lynch/Turbin/Michael
Robinson/Ware
Do I think Lynch/Robinson both could be gone after this season? Yes
Do I believe the Seahawks were NOT a big fan of their Goal-Line/Short Yardage Defense? I do, Michael spent last season being a Goal Line specialist and Ware is a monster in short-yardage situations.
People read into so much stuff, I think, the Seahawks want to win a Superbowl... you do that by great depth insurance and make sure you iron out your wrinkles which our Goal-Line and Short Yardage situations with our RBs in 2012 left a lot to be desired.