Just my opinion, but i have found that it is actually the favorites in mma that seem to be undervalued. Upsets are more likely to occur than in boxing and their are more ways to lose i fight, but you just dont see the
-1000, -1500 that you get in boxing. There are many up and comers that are fed overmatched opponets even in the big shows such as the ufc. I feel like -400 is a huge line in an mma fight, when in actuality the odds should be giving the fighter a 95% chance and up, not 80%.
MMA is the only sport that i have consistently played larged favorites and won over the last few years.
However, would be interested to see how your strategy of playing +400 dogs works if you are gonna keep posting it.