Stop Leaving Money on the Mat
Love MMA? Love betting? We do too. But let's be honest: if you're not getting the best odds, you're fighting an uphill battle.
Sportsbooks build in a hidden 'tax' – the vigorish or "vig" – on every bet. It quietly eats away at your bankroll, even when you pick winners. FightingPost is here to equip you with the knowledge and tools to understand the market and make smarter decisions.
What We Offer: Your MMA Toolkit
Track Fighters
Use our notes system to log observations, training camp rumors, or tactical insights.
Play the Games
Test your fight knowledge in our "Last Man Standing" and "Pick Six" games.
See the Odds
We display odds to keep you informed (though remember to always shop around!)
Understand Markets
We provide tools to help you understand betting markets and make smarter decisions.
The Hidden Cost: Understanding the "Vig"
So, what is this 'vig'? Bookmakers aren't your friends; they're businesses designed to make money. They do this primarily through the vig (short for vigorish) or margin – essentially a built-in tax on every bet.
Let's take a real example: DraftKings offering odds for an upcoming fight:
Bryce Mitchell: +270
Jean Silva: -340
What do these numbers really mean? They represent implied probabilities:
- Mitchell (+270): 100 / (270 + 100) = 100 / 370 = 27.03% chance to win.
- Silva (-340): 340 / (340 + 100) = 340 / 440 = 77.27% chance to win.
Now, add those probabilities together: 27.03% + 77.27% = 104.3%.
Where did that extra 4.3% come from? That's the bookmaker's margin. They've inflated the probabilities so that no matter who wins, they collect more than they pay out across all bets. This 4.3% is sliced off the top before you even consider if your pick was right or wrong.
The Bankroll Bleed: Why Settling for Bad Odds Kills Your Profit
"Okay, 4.3% doesn't sound that bad," you might think. Let's simulate what that really does to a hypothetical bankroll.
Imagine you start with $10,000 and bet on every fight on a 14-fight card. The graph below shows how your bankroll would decline based purely on the "tax" each platform takes:
Bankroll Decline Over 14 Fights
As you can see, in just one fight card (14 fights), standard sportsbook odds with a 4.2% vig can slash your starting bankroll almost in half! This happens before you even account for winning or losing your actual bets. If you aren't actively seeking the best possible price, you're fighting an uphill battle with one hand tied behind your back.
Beyond the Bookie: Finding Better Value
The good news? Traditional sportsbooks aren't the only game in town. Lower-margin platforms let you keep more of your winnings:
Betfair Exchange
How it works: You bet against other users, not the house. Betfair acts as the platform facilitator.
The Cost: Instead of vig, they charge a small commission (typically 2-5%) but only on your net winnings on a market. Your commission rate is determined by your package choice in the "My Betfair Rewards" section.
The Advantage: Odds are often fairer, reflecting a truer market price because there's no built-in bookmaker margin. Paying 2% on winnings is vastly better than losing 4%+ embedded in every single bet.
Polymarket (Prediction Markets)
How it works: You buy and sell shares representing the probability of an outcome (e.g., "Fighter A wins"). Prices range from $0.01 to $0.99, directly corresponding to implied probability (1% to 99%).
The Cost: Effectively 0% commission from the platform itself. Prices are purely driven by user supply and demand, like a stock market.
The Advantage: This is often the closest you can get to "true" odds. There's no house edge baked in. You're simply trading probabilities with other users. The only "cost" is the bid-ask spread created by the market participants themselves.
We built FightingPost because we're passionate MMA fans tired of seeing fellow fans leave money on the table due to unfair odds. Use the tools we provide – track fighters, test your knowledge in our games, understand market mechanics – to become a more informed participant.
Odds Calculator
Convert between different odds formats, see implied probabilities, and calculate the bookmaker's vig with our interactive calculator below:
Betting Odds Calculator
How to use:
- Select market type (two-way or three-way).
- Enter odds in any format for at least one outcome.
- Click "Calculate" to convert between formats and see the vig.
Lower vig percentage = better value. Traditional bookmakers typically have 2-7% vig, while exchanges like Betfair might have 2% commission on winnings only, and Polymarket might have as low as 0.5% in spread costs.