The amount of minutes Sy and Blackshear play together. I would guess Buzz wouldn't play extended minutes with them both in. We just need that other big or two when Blackshear gets in foul trouble, winded, injured, sick, etc. You cannot make a run with one big, unless he is a bulletproof beast who is allowed 10 fouls per game. And yes, Horne is a small 4 at 6'5".