According to Seahawks Insider Red has a MCL tear - http://bit.ly/bwAbwC. I thought the worst on this as I was convinced that this type of tear is more severe than an ACL, but seemingly not.
Normally it requires no surgery but he's been shipped straight in so this must be a grade III tear; a tear which takes 3-4 months to heal.MCL tears are much less concerning than say an ACL or something that would require micro-fracture surgery. See Marcus Tubbs for the issues that can come up there. I would hope he will have a full recovery in time for the off-season program.