A shoulder dislocation can cover a lot of things. Some times the shoulder dislocates and pops back almost immediately. Ligaments are stretch. The shoulder is sore, but once the inflammation goes down, he should be OK - back for the Jets game or Buffalo game at the latest.
If when they saw him in the sling the shoulder dislocated and was popped back in the tent the damage is worst, but still only a time situation so maybe 3 games.
I don't want to think about it if if its worse. Then I guess it would be Thuney at RT and Eluemenore at LG. Though if its long term, I thought Elumeneor had some experience at RT at one point.