well when you think about it, and how they termed it "serious/significant" there really are only two devastating foot injuires ( that can derail a career ) - achilles and lisfranc.
And since Underhill specifically replied to Kat that it wasnt an achilles, just had to be the worse of the two. Hopefully he returns to old self, but damn if that injury for a DE isnt likely the worst one to have.
ugh.