The way I see it, we've got 2 guys fro LT who have a ton of talent and potential but also shouldn't be playing 100% of snaps this year.
Moretti because of this long recovery process and, if it's like the player for the Cowboys, the schedule is 1 year off, 1 year of limited play, then back to regular PT.
Sherman because at a listed 275 (and big guys always lose weight during camp, too), he's like Haigler was a a RS-Frosh when he split time at RT with Kronshage. Sherman doesn't have the mass to be our starting LG and play all the snaps there. But he's got the athleticism to play in space and handle college DEs (generally 250-270 lb guys).
Start Moretti at LT, rotate Sherman in. The, start Kaiser at LG where his size and experience are major assets and his less quickness isn't a liability against an inside rush like it is against those outside DEs.