Wow, not good to lose your starting NT.
This likely means Pennel makes the roster, and Guion too. I'd think they will try to play Guion quite a bit in the last preseason game. I think going with Boyd/Pennel as your duo at NT week 1 vs. Seattle is risky, especially with what they have at ILB.

I think they will kick the tires on Pickett and wouldn't be against bringing him back on the cheap if Guion's hurt/no good. Pickett gives them size and some run stopping but zero pass rush. Not sure about scouts bringing some new face in unless it's a surprise veteran cut who might still have something in the tank. I don't see it happening.