This is one reason why the NBA closely guards the identity of their referees before the games. Try finding out who will be officiating a game before it is played. It is next to impossible. Some of these guys call everything, others are the opposite. The difference in NBA officiating from one game to the next is often extreme.
Remember Mavs owner Mark Cuban has had a running battle with the officials, just got fined another 200K for complaining about them the other day. Last year, Dallas couldn't win playoff games Dan Crawford reffed, this year they have lost one playoff game - Game 1 vs the Spurs - the one Dan Crawford was in. They shot 28 free throws in that one. 43 in game 2 and 50 in game 3