That's the result of Coach Fisher and his staff doing more than simply emphasizing defense.
They've linked defensive effort to playing time.
“The nice thing about our team is that if a person doesn't compete hard, we've got somebody else that we can put in. I don't want anybody playing out of fear or afraid to make a mistake, but I want them on edge to the point if where they don't play hard, there's going to be a reason they'll be playing fewer minutes.”
As this article puts it, "Fail to play defense and you can be rest assured of taking a seat."
According to sophomore guard D.J. Gay, one of the nation's leading scorers as a high school senior:
“Everybody has bought into what we're doing defensively and everybody wants to play. But to get on the court, you have to defend; if you don't, you're coming out. Guys are playing their hardest to stay on the court.”