none are gonna be mid round picks. A lot of it also has to do with how they do during their pro days and private workouts.
Merling fell because he couldn't work out until a week before the draft; where he was 290+ over 20 lbs heavier than he was at Clemson.
Some could fall to round 2 or maybe 3 (like Little Animal), but none are taking a huge hit to the undrafted realm.
Andre Smith will take a huge hit though because he just left without telling anybody. A lot of teams go to the combine mainly for the interviews. If you don't interview well, you can drop like a rock. Look at Ko Simpson. He was a first round lock, but he completely bombed the interviews and fell to BUffalo in round 4.
Not saying the combine isn't important because it is, but the best teams are more interested in the interviews and the position drills than the 40's and the bench.