I can't imagine that they'll go from signing Demby to taking to the active roster, but last week showed an issue.
We've got 3 elders along the OL
At some point, in the last two games, there's been issues with injury.
There's a host of LBs that they carry live rostered on game day.
Treyvon Young
Ramik Wilson
Bryce Hager
With no Hatfield, I imagine they'll keep these guys active, and ought to consider Demby at that point as emergency backup.
As an aside, Allen the center, is very compact. I know he's tough, tough guy, but still, when he's been out there it's noticeable.