as to their status:
Mike Mitchell as far as I know still listed as week-to-week with the ankle. so maybe he gets back for the Thanksgiving tournament, or maybe they hold him out until December.
Cochran has some kind of foot injury. initially, the word was that he would return in December. but recently, it's been floated that he might not be back until January. so let's split the difference and say mid-December which would have him miss the first couple Conference games.
Williams has mono. just depends on when he was diagnosed, how sick he was and how long it takes him to get his strength back. in some cases, it can take several months to be back at full strength.
of the three, Mike Mitchell is badly needed for outside shooting and another ball-handler. Harder to say on Cochran, but at least he would add some depth and he's supposed to be a good defender. I don't see Williams being a factor unless he can come in and bomb a couple of 3's.