For anyone who doesn't know what I'm talking about, go watch Youtube clip about the Jazz head coach called time out after Collin Sexton had the momentum as he drove down the lane leaving Rui behind for a score that didn't count because of the timeout called.
I don't think this was an intentional move to sabotage the game. Also, even if there was something fishy, this wouldn't have been him betting against the Jazz but the management telling them take it slow and collect losses. But usually you wouldn't make it that obvious, that's why I think it was just a big fat brain fart.
If they want to take a timeout they should have taken it right at the beginning of the last possession. They way he did it sure looks very odd but maybe he thought Sexton wouldn't get off a good shot because when he started to run on the court to take the TO Sexton was guarded pretty well. Once the coach started to run on the field Sexton beat his defender though and was right in the lane. Anyway, he had to call the TO at that point otherwise it would have been a technical foul since he was already on the court.
Overall a very unlucky situation.