I don't believe Thompson traded up for Spriggs to play him at guard either.
Did I say he was drafted to play OG? No I did not. I said they didn't draft him to sit on the bench until Bulaga's deal was up 4 seasons down the road. You don't draft a guy in the upper second round if you don't intend him to play somewhere and soon. Follow the logic:
Bulaga is signed through 2019; they were going to pay whatever was required to keep Bakhtiari as indicated by his contract. So, year one Spriggs is the presumptive emergency backup tackle. You don't exactly know what you have in a draftee until you get him on the field. Let's say he looked as good as Bakhtiari did as a rookie going into opening day. Then an OT option opens up. Release Bulaga? Move Bulaga to OG instead of Taylor?
Spriggs did not show himself to be a ready-for-prime time OT. Not all that surprising or disturbing. On to year 2.
So, what if Spriggs comes to camp and suddenly looks like the second coming of [fill in the blank outstanding pass blocker]. Then maybe it will be Bulaga to OG and Spriggs to OT. I would not expect that either.
In the final analysis, when the Spriggs pick was made they had a good idea they were not re-signing Sitton and they also had a good idea they would not be resigning Lang if he had a good, healthy season drawing good OG money in FA. The cap was not going to be there. Tretter was known to be a FA as well.
Spriggs was going to be playing somewhere, and not necessarily OT, though that might have been the upside hope and might be the case down the line. As it turns out, it looks like it's going to be OG this season unless he stinks up the joint, which I don't expect. He has to step up his run blocking game, find the chemistry with his cohorts, and he'll need some more bulk.
OT or OG, he needs more heft.