
If there's one great ignored fact about defense in the NBA, it's how important it is to limit 3-point attempts. We all focus so much on the interior or on fouls that we forget the most basic tenet of committed defense: challenging every shot. The great defensive teams, for the most part, challenge every shot. In some forms, this leads to a low opponent shooting percentage.
But for other great defenses who challenge everything -- San Antonio, Boston, Orlando -- challenging every shot means you dictate the types of shots opponents take. Over the last five NBA seasons, there has been a strong correlation between defensive efficiency and the percentage of two-point jump shots taken by the opponent. In other words, a key cause (and result) of great defense is the prevention of 3s and inside shots. It's not universal, but it's substantial. (Eye-poppingly so.)
The Lakers have a strong, strong defense -- No. 6 in the league this season. But it doesn't fit the "no 3s" mold. At all. In fact, the Lakers defense allows a lot of 3s. Against the Magic in the Finals, that could spell doom.