I'm thinking of 4s and 5s when I say bigs. Sampson might pack some weight on and play the 4 at times, especially in an uptempo offense, but I can't see Harkless doing that (and I thought it was a beef Nate Blue had with one school, wanting him to play down low? Or maybe I'm thinking of another recruit, like Tyler and his dad).
If you only have 2 big men and a part-timer, what about foul trouble, injury...?