Roby's going to really light up the combine and once they look more into his disappointing junior year and see how terrible the defensive scheme was (I've already seen it referenced several times in articles talking about Roby) I think he'll end up going a lot higher than expected. CB's that run in the low 4.3's (which I think he'll hit) and are extremely physical tacklers don't last very long in the draft. I think he likely goes in the early 2nd, but no later than the mid 2nd.
Shazier will light up the combine as well (I'm thinking a 4.49-4.51 40) but his size (probably come in around 235-238 lbs) will scare teams off. Early 2nd most likely, but definitely won't last to the 3rd round.
Hyde will have a good combine and seems to be the consensus #1 RB, so he'll probably go late first at the earliest, but more than likely he'll be a early 2nd rounder. I think all three of these guys are picked around the same area, and it's a complete toss-up who goes first... I'll go Roby since he plays a premier position.
Mewhort will go in the 4th - 5th, Corey Brown in the 6th - 7th. I think Brown could really help his stock this week.