D a concern for Dallas? 

August, 19, 2013
8/19/13
4:43
PM ET
The Dallas Mavericks ranked No. 20 in the NBA a season ago in defensive efficiency, giving up 104.0 points per 100 possessions. For comparisons sake, Indiana led the league in that department at 96.6.

Did the Mavs' many moves this summer address their sub-par defense?