Rawlinson was a depth pick up. I expect that he'll only play against FCS competition the rest of the way.
Shoaf is pretty raw, but a great athlete. He's a project with very little chance to contribute right away. Braden Brown is probably a good comparable.
Hicks is the standard lightly recruited Bingham lineman and fits the mold of BYU's recruiting model. He could develop into a 2 deep center, but probably not until Koroma is done.
Herring is another lightly recruited project player. I don't know what the coaches saw to offer him, but they had a full camp to evaluate him. He projects as a very tall tackle.
Chambers is another lightly recruited player (offered by Kansas). I like him as a guard/tackle prospect. He might be a good bet to get into the 2 deep, but he comes home in the summer.
Pulsipher is another lightly recruited tackle prospect. He probably has the highest likelihood of contributing right away if he comes back in the right weight range.