Good question about the OL. We lose Kelly and Jackson with the rest coming back, so the good news is we have a lot of experience coming back. Cam Rob will hopefully get back to being what he was last year once he's healthy. Taylor has played ok, but not great. RP seems to have done pretty well this year, especially since it's his first year to start.
Between Bozeman and Hassenauer, there's some experience at center. I'd imagine we'd lose some leadership and communication at first (although sometimes I worry about that now with all the pre-snap stuff that's happening), but Kelly also isn't as physical as would be ideal sometimes so we might improve there.
Jackson? it's hard to know. One play it seems like he's doing his DJ fluker impression and driving his guy downfield, the next he's not blocking anyone. Hopefully if we can get someone to just eliminate all the negative plays it will at least be a wash, if not an improvement. We might just see something against LSU if Jackson's injury keeps him out of the game. Sounds like Greene is next man up and while he's not quite as big, I'd have to bet he is much more agile on his feet since we've been playing him at TE a lot this year (and watching his catch last year).