If Auburn wins today (and they are a pretty solid favorite according to the NET game predictor), the Tigers will wrap up 10th place and a first-round tourney bye. Even if Florida also wins today, Auburn has the head-to-head tie breaker over the Gators.
If Vandy wins and Florida loses at Missouri, the three teams (Vandy, Auburn and Florida) will finish in a three-way tie and have 1-1 records against each other. The next step in the tie-breaking system is to go to the top of the standings and see which team did best against the higher ranked team. This is where Vandy falls out of the picture. Auburn has a win over Ole Miss, currently 4th in the standings, and Florida has a win over Alabama, currently tied for 5th. There is still some wiggle room in where Ole Miss and Alabama finish, so we won't know for sure who gets the 10th place finish until today's games are all over. But, I can't finagle any scenario where it's Vandy.
Still, if we wind up 4-12 and tied with Auburn and Florida, as far as I'm concerned we'll all be tied for 10th in the standings, then the tourney seedings will be handed out from there. That's the best positive spin I've got.
