The Dallas Maverick really seem to have put a focus on the defensive side of the court this offseason. For as long as I can remember, the Mavs have been more of a run and gun type system with defensive not being as important as offense.
This style of play was very popular with Don Nelson coached teams and head coaches Avery Johnson and Rick Carlisle have each followed in that style. When the offense runs and moves like the Mavs have, defense can quickly become second fiddle.
Rick Carlisle, of course, has proven that he is a versatile coach that knows the game of basketball better than most.