GM said:
I've got dogs up 101-71-4. 34 spread covers by dogs that lost outright, and 67 outright dog wins. Numbers could be different because of games where one team opened as a dog and closed as the favorite. In such cases I consider the favorite to be the team that closed as the fav, not opened.
This is the perfect argument for those people who say "just pick the winner of the game and don't worry about the spread". Seeing as dogs have won outright almost as often as favorites have COVERED, those 34 spread covers tilt it HUGE in favor of dogs.
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I don't think you can really say this without considering the odds on dogs winning outright.
If you bet 1.1 units on every dog with the spread, you'd be (101 - 78.1 = +22.9). [78.1 = 71*1.1]
Let's say dogs were +190 ML on average. If, instead, you bet 1.1 units (same risk) on every dog at +190, you'd be (140 - 115.5 = +24.5). [140 = 67*1.9*1.1 and 115.5 = 105*1.1]
Now, the question is +190 a reasonable "average". Certainly one could go back and figure it all out. The averages for all the dog ML's this week is +197 (from active SIA lines). Of course, it's more common for lower priced dogs to pull the upset so the average might not be so high. I shaded it down to +190, just to show that's kind of a "balancing point". If the true average were much higher or lower, we'd see a swing on way or the other.
I'm not sure what the actual average is, but the point is that "just picking the winner" would get you about as close as picking ATS if you played all dogs.
We've also had several BIG upsets this year with ML's over +300: NYG ov STL, DALL ov STL, HOU ov DALL, HOU ov JAX, IND ov PHI, I even got PHI ov SF at +280. It takes missing a LOT of games to make up for that kind of cash. Almost every one of those games was a 10 point spread, which are usually about +350 to +390.