I have long said that one indication of good defense is the fact that opponents cannot get off a shot. But other than shot clock violations, that stat does not get tracked. "He is a good defender because he keeps the guy he is guarding from shooting."
In his weekly Bubble Watch, John Gasaway said this about Rutgers' defense: "Rutgers is the rare D that takes care of business on the defensive glass while forcing a higher than average number of turnovers. Opponents record a very low shot volume against this defense."
You can't shoot a high percentage if you can't even shoot.