We're getting ahead of ourselves. This guy writes for the LA times and was just speculating before knowing how long Mo Williams will be out. Williams seems to think the injury is as when he fucked a ligament back in 2008, but, to my knowledge, an MRI has not confirmed anything yet.
Anyway, if the Jazz were actually interested in doing anything, they probably want to do it fairly soon, because they do it if they wanted to make the playoffs and the race is tight. If Williams is out for a while and they go on a losing streak, they will find it very difficult to get back into the race.