I think the "Doc Vetoed" a trade is taking it a bit far. Although I have no clue what goes on behind closed doors. All he said was: "At the time I talked to him, it was a different deal and I did put a stop to that one. But I also told him that something might still happen," Rivers said.
One of the great things about this organization is how Danny and Doc get along. They are on the same exact page which isn't always the case with most GM's/Coaches. Were lucky to have both.
Danny runs everything past Doc from what we've heard in the past. I doubt he went to him and said, "hey, I'm doing this trade". I think it was more like, " hey, I just got this proposal, what do you think? ". Then Doc put a stop to it, or told him he wouldn't like it. Ultimately its obviously Danny's decision as GM.
They have such a great relationship that Danny doesn't tell Doc he's doing anything. They work together. He runs everything past Doc to get his take. Its a well oiled machine.
But again, who knows what goes on behind closed doors. Just my guess. If I'm guessing again it was probably all about Battier and Houston. With Perkins involved.