Terry Ebaugh

I spent several months working on some sports betting models. My results are on Juice Reel (affiliate link) available for everyone to view. 

My current models are for the NBA, NHL, MLB, MLS, and WNBA.

With sports betting, it is important to understand:

• sportsbooks are very good at setting odds
• underdogs lose frequently
• value betting is about mis-priced probabilities, not picking the “better team”

My models, like others, are profitable because we make money by:

• buying strong teams when the public reacts to a bad matchup
• fading overpriced favorites
• identifying where implied probability and true probability diverge. 

To be profitable in sports betting, you need a win rate of 52.4% to break even. However, if one is frequently betting underdogs, then you only need to win 33% to 45% of your bets. 

Today I was asked why I placed a bet on the Dodgers at +133. Good question.

The bet is not “the Dodgers will definitely win.”

The bet is “the Dodgers are winning often enough relative to the price to make +133 profitable long term.”

At +133 the sportsbook is is saying the Dodgers have a 42.9% chance to win.

P = 100 / 133+100 =~ 0.429.

If my model thinks the Dodgers actually win 49-52% of the time accounting for:

• starting pitchers
• bullpen strength
• lineup quality
• recent team form
• rest / travel
• market context
• historical team performance
• closing-closing line calibrated features

then +133 becomes positive expected value even if the Dodgers are technically the underdog. If the true win probability were 50% then EV = (0.50 x 1.33) – (0.50 x 1) =0.165 which is a theoretical long-run return of +16.5% per unit wagered. It’s important to remove the gut feeling, or loyalty to a local sports team and bet the models. 

So if:

• Market implied = 42.9%
• Model probability = 51%

then the edge is 8.1% which is substantial in MLB moneyline betting. 

Remember: I’m not betting the Dodgers because I think they’re guaranteed to win — I’m betting them because the price (sportsbook price)  implies they win less than my model estimates they actually do.

This post is not an inducement to gamble. If you think you have a gambling problem call 1-800 Gambler. I do not guarentee my sporting picks will win, nor do I guarentee someone using my picks will make a profit.