The odds favor Fedor by so much. For Rogers since he's the underdog, his odds are 454/100 which comes to 4.54.
So if you bet 100 (for example) on Rogers you will win 454 back, plus the initial 100 you put in.
If you bet on Fedor to win his odds are 100/540 which comes to 0.19. So if you bet 100 on Fedor you only make 19 plus the 100. So you'll have 119 for betting 100.
Therefore if Rogers gets a flash KO and someone like Toxic toxic put 1 million, he'll win 4.5 million plus the 1million he originally put in.
Hope that helps and that's why a lot of us are betting on Rogers hoping for a high pay day.
But Fedor will probably win.