Nobody on the team wants to play defense..........including the headcoach, so they are looking to get a dirty player if you will. Its not the first time they did this, the Mavs did have Dennis Rodman on the team once.
Wallace doesn't put out the effort every night to be a dirty player. Besides I don't think someone with has much talent has Wallace, needs to be a dirty player.
When I said "dirty" I did not mean as in a walking flagerant foul player looking to get PIMs if you will. I was refering to a player who is willing to hustle for offensive rebounds, make a move for a steal, or take a charge if needed.