Think about it. Currently, depth chart looks roughly like this:
LT – Beatty, Brown, Jerry
LG – Schwartz, Jerry
C- Walton, Richburg
RG – Snee, Mosley, Richburg
RT – Pugh, Brown
Nine players a virtual lock. The tenth guy?
Brewer? He has had his chance and looked pretty bad.
Reynolds? They have two centers and one plays guard as well (Richburg, theoretically)
Eric Herman – Still developing. Eligible for practice squad?
Love? No. Johnson Webb? No. Troy Kropog? No.
Giants are in good shape in the interior of the OL but have one true backup tackle. Jerry has played there and can again in a pinch. Brewer has played every position on the OL except center. TC and Flaherty know Brewer. They may hope he improves. My guess is if there is a 10th man on the OL it will be Brewer, unfortunately. Maybe a better backup tackle option will come in final cuts from another team.