Why does every mock have us taking Guards when we seem stacked with interior linemen (Kemo, Hartwig, Essex, Urbik, Legursky, Foster) and we have nothing at OT (Starks, Colon, Hills and the new guy from Buffalo)?

I would think if we are going OL it would make sense that it would be an OT and not more interior linemen. Yet all the mocks have us taking guys like Iupati, Jerry, etc.

I know there was talk that Iupati might have the athleticism to develop into and OT but just cant wrap my mind around why everyone has us taking Guards.