IMO the only real question is LG as I think as long as Allen is 100% and I've heard nothing to think he isn't, he is the presumptive starter. We know Corbett will be an OG on one side, but will he move back to the left side? I think he might. I think the lack of game experience will hurt Brewer and he will be in a backup role. So I think the other OG will come down to Evans, Edwards, Shelton, and Brewer. I like Brewer and he might have the best mobility of the 4. Although last year he was looked at by Kromer as an OT, like Evans by his build he's an OG perhaps a RT in the NFL. I am not convinced Edwards will continue to start at LG and that will be left to Carberry.
My only issue with the o-line is RT Havenstein. He's paid too much to sit but he's given up 9 sacks over two years and his heavy feet are a huge liability as is his cap of $8.8M. Remember the Rams schedule have them facing largely the top-tier teams. They can't afford an OT who can't block speed rushers because this year they will see a lot of them. He has a manageable dead cap of $3.1M which would clear $5M in cap space if he isn't on the roster. With Jared and Todd still on the dead cap, they can't make Rob a post June 1 release. I don't see why they would wait since he's gone next year anyway. Better one year early than one year too late, i.e. if Stafford gets hurt. Dunlap killed Havenstein last year. Goff got hurt because of bad o-line play.