
I obviously picked the Chargers this week. For everything else I'm going totally quantitative. For a while I had been trying to figure out how to relate points differential or yards/play differential into a way to attempt to pick against the spread. Bill Barnwell and Bill James provided the answer this week. Taking the Pythagorean winning % for the two opponents and Bill James' formula, you can determine how often the favorite should win. Then I used Spreadapedia to look at how often a favorite at each spread has won outright and added 3% for the home team. For example, based on the Chargers and Raiders points scored and points allowed, the Chargers should win 60.8% of the time. But 7 point favorites win 72.2% of the time. If we expect the Chargers to win 60% of the time, they should probably be favored by 3 or 3.5. So, strictly quantitatively, I would pick the Chargers to win outright and the Raiders ATS, but I never pick against the Chargers. I just can't.
Unfortunately, all of this makes for fairly boring analysis of each individual game.