How Often Do MLB Favorites Win? 58.2% Since 2004
MLB favorites have won 58.2% of games in the historical dataset analyzed by ProComputerGambler since 2004. The important part for bettors is what comes next: despite winning well over half of all games, blindly betting every favorite produced a -1.8% ROI.
That distinction explains why favorite win percentage and betting profitability are not the same thing. A favorite can be more likely to win and still be a poor wager if the moneyline price is too expensive.
Quick Answer: What Percentage of MLB Favorites Win?
In the historical sample used for this page, MLB favorites went 30,008-21,514 straight up. That is a 58.2% win rate across 51,522 favorite-side game results.
| Historical MLB Favorite Metric | Result |
|---|---|
| Straight-up record | 30,008-21,514 |
| Favorite win percentage | 58.2% |
| Underdog win percentage | 41.8% |
| Favorite betting ROI | -1.8% |
| Reported profit/loss | -$141,209 |
| Historical period | Since 2004 |
The headline number is therefore simple: MLB favorites win roughly six out of every ten games, but that alone has not made them profitable to bet indiscriminately.
MLB Favorite Betting Results Since 2004
The historical output used for this analysis produced the following aggregate favorite results:
SU: 30,008-21,514 Win Rate: 58.2% ROI: -1.8% Reported Profit/Loss: -$141,209
Favorites won far more games than they lost. The betting return was still negative. That is not a contradiction; it is how moneyline pricing works.
Sportsbooks do not offer the same payout on a strong favorite that they offer on an underdog. The higher the market’s estimated probability of a team winning, the more a bettor normally has to risk relative to the potential return. As a result, win percentage must always be evaluated together with price.
Why Can MLB Favorites Win 58.2% and Still Lose Money?
Suppose two teams both win frequently, but one is routinely priced at a much more expensive moneyline. The expensive team needs to win often enough to overcome that price. Simply being correct more than half the time does not establish an edge.
This is why the question “How often do MLB favorites win?” is useful, but incomplete. A bettor also needs to ask:
- What price is being paid for the favorite?
- How often does that price need to win to break even?
- Does the favorite’s historical win rate exceed the market’s implied expectation by enough to create value?
- Does the result change for home favorites, larger favorites, or specific price ranges?
- Has the line moved enough that the original value is no longer available?
For a broader explanation of this relationship, see MLB betting market efficiency.
MLB Favorites vs. Underdogs
Every favorite win is an underdog loss, and every underdog win is a favorite loss. In this sample, the straight-up split was:
- Favorites: 58.2%
- Underdogs: 41.8%
The difference is large enough to show why favorite-heavy betting can feel comfortable: the favorite cashes more often. But comfort and expected value are different. The market charges for the higher win probability.
For the other side of the market, see Are MLB Underdogs Profitable? and the direct MLB favorites vs. underdogs historical comparison.
Does a Bigger MLB Favorite Win More Often?
Aggregate favorite win percentage combines many different prices into one number. A short favorite and a very large favorite are not equivalent betting situations. As the moneyline becomes more expensive, the market is assigning a higher expected chance of winning—but the bettor also needs a higher win rate to justify the price.
That makes price-range analysis more useful than assuming every favorite should be treated the same. Our related research separates these situations in MLB Big Favorites Betting Results Since 2004.
Do Home MLB Favorites Perform Differently?
Home-field status is another important split. The overall 58.2% figure includes favorites in different locations and at different prices, so it should not be treated as a universal expectation for every favorite type.
For the location-specific breakdown, see MLB Home Favorites Betting Results. For a separate look at how often favorites win by enough to matter on alternate run-line structures, see our MLB favorite margin-of-victory analysis.
What the 58.2% Historical Win Rate Actually Tells Bettors
The aggregate number is useful as a baseline. It tells us that the market correctly identifies the eventual winner more often on the favorite side than on the underdog side. It does not tell us that the favorite is automatically the better bet.
A better way to use the number is as a starting point for more specific questions:
- Which favorite price ranges have historically held up best?
- When does market pricing become too expensive?
- Do home and road favorites behave differently?
- How much does the favorite usually win by?
- Are current lines offering the same value as the historical sample?
Those questions move the analysis from raw win percentage toward actual market value.
Methodology and Data Scope
This page summarizes ProComputerGambler’s historical MLB favorite dataset beginning in 2004. The figures above are aggregate results from the dataset used for this article. They are intended to describe historical market behavior, not to imply that every future favorite has a 58.2% chance of winning or that historical performance guarantees future results.
The more specific the betting question, the more important it becomes to segment by moneyline price, location, season timing, current market conditions, and other relevant variables instead of relying on the league-wide average alone.
MLB Favorites Key Takeaway
MLB favorites won 58.2% of games in this historical sample, but betting every favorite returned -1.8% ROI.
That is the central lesson: winning more often does not automatically mean making money. In a priced betting market, the question is not merely whether the favorite is more likely to win. The question is whether the available price gives the bettor enough value relative to that probability.
For deeper research, browse the MLB historical betting systems archive. Subscribers looking for the underlying research environment can also explore MLB Raw Numbers.
I used to just look at stats and matchups… never really paid attention to line movement like this.
Wait so favorites win more than half the time… shouldn’t that be profitable then?
That’s the assumption most people make. The issue is the price you’re laying — you’re often paying more than that win rate justifies.
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