Ya ya, I had Machida winning too, but not so decisively that he shoulda been a -600 fav or whatever he peaked at. Looks like it was -530. And closed around -330, still not as low as the opener of -270.
But there may be some truth in your conspiracy theory in this way: Sal D'Amatto, Chris Watts, and Richard Winter are likely to be American judges - I don't know and can't be assed to find out. If so, and that was released ahead of time, it may have lead some of the big money to go on Davis.