Dremon Green's Defensive Impact

I just think like physically he can't hold up compared to number one. But in this era, has that been an issue? I think an issue is framing it incorrectly. We're not moving the number one into this era. He's a little smaller, so he's giving something up. How do we really know how valuable it is to have a coach on the floor who can see every play before it happens and then have the ability to block shots?"