Been playing this for the last 5 seasons with great results. It is an entirely original system/strategy I came up with myself (with a logical concept behind them to justify it's success rate). Usually will give you 15-20 plays a season, and doesn't start until week 5.
* Starting week 5 (first week in October), bet against underdogs of 20 or more points who's run defense averages over 5 yards against per carry.
Filters:
A (I play these for 2 units): Team you are betting on run offense averages over 5 yards per carry.
B (I play these for 1 unit): Team you are betting on run offense averages between 4 and 5 yards per carry.
* Void any team meeting the system criteria if their run offense averages less than 4 yards per carry.
Note: Get them as soon as the lines come out, as the line usually continues to climb in favor of the favorite. You will typically get an extra 0.5 - 3 points of value wagering on the opening line most of the time.
I lost the notepad I had all the specifics of the past results documented in, but I pretty much remember them off the top of my head. Filter A had one season of the five where it finished one game under .500, but the other four years it finished between 70%-85%. Filter A has averaged out around 75% overall over the five seasons. Filter B has finished 66% or better all five years I have played it. Went 75% last season, was between 66% - 70% the other four years. Filter B has averaged out around 70% over the 5 seasons.
If this is useful to you and you feel inclined to throw me a couple points for sharing, that would be cool. I assure you all the past results I rattled off are accurate.