If Whitehouse loses to Mt. P this week they would be (2-2) just like Marshall. If Hallsville loses to PT they would be 2-3, which would drop them to fourth place. Like you said, I don't think either one of those happen this week. Both of their defenses are terrible, but MP and PT are worse.
They already beat Whitehouse and they nearly upset Texarkana last week. I think both of them are 7-1. So they aren't scared of a 4-4 team. They don't have anything to play for. No playoffs. They are just playing for pride, which makes them dangerous. We better be ready or we could find ourselves with another unplanned loss.
There's several scenarios that could determine if we finish 3rd or 4th. Beating Whitehouse and Whitehouse losing to Thigh is the easiest way to clinch 3rd.
If we win out and Hallsville loses final game we clinch 2nd and a home playoff game.
If we win out and Whitehouse beats Thigh there's a 3 way tie for 2nd. Then points determine 2nd through 4th. So we would need a convincing win over Whitehouse to get a better seed. Unless of course Hallsville gets upset the final week like I mentioned above. Then just a 1 point win would get us the 2 spot.