I mentioned this in another thread, but it might be relevant here too. I think we're going to see a blurring of the line between ILB and OLB for the Pats this year. I think Mayo, Spikes, and Guyton are all going to have snaps during a game where they have "outside" responsibilities, especially when we're playing with 4 hands down players and 5 DBs, leaving just two LBs on the field. If those LBs are Mayo and Guyton, they have to cover from midfield to the sideline, much like an OLB would in some situations.
In the base, they won't be the OLBs, but they'll have OLB assignments in sub packages.