Sunday NFL Betting Algorithm Predictions for 4 Underdogs, Including the Cardinals, Texans, Steelers & Raiders

The Action Network has developed a historically profitable predictive betting system that reports a return on investment (ROI) of 9% since 2005.

The algorithm has been profitable 56% of the time since the second Bush administration over a lengthy sample size, going 344-268-18 during that span.

The games targeted tonight are:

• Eagles vs. Cardinals (4:25 p.m. ET)
• Texans vs. Jaguars (1 p.m. ET)
• Steelers vs. Bills (1 p.m. ET)
• Raiders vs. Chiefs (Monday Night Football)

The pick is always on the spread and only lights up under very specific parameters. The algorithm also incorporates tracking data proprietary to Action Network.

Statistical significance is ensured by using a massive data set over a long time horizon.

If you had bet $100 on each game that has fit this particular betting algorithm, you'd be up about $5,300.

Compare the 9% ROI to the average annual return of the S&P 500, which has hovered at around 8% for over a century. That index is down about 24% year-to-date. Meanwhile, Bitcoin, for instance, is down about 60% during that same timeframe.

Still, despite similar principles regarding long time horizons and sample sizes, don't use this betting algorithm as an alternative to investing. Sports betting inherently has more variance game-to-game.