What is vig (vigorish) in sports betting?

Vig — short for vigorish, also called juice or overround — is the margin a sportsbook builds into its odds. It's the difference between the true probability of an outcome and what the odds imply. Lower vig means you keep more of your winnings on every bet. For example, a standard -110/-110 line has about 4.76% vig.

How often is this data updated?

We pull fresh odds from The Odds API three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds. The timestamp at the top of the page shows the most recent refresh.

How is the vig grade calculated?

Each sportsbook is graded on a letter scale based on average vig: A+ (under 2%) is exceptional, A (2–3%) is excellent, B+ (3–4%) is above average, B (4–5%) is the industry standard, C (5–6%) is below average, and D (above 6%) indicates high-juice markets.

Why does lower vig matter for bettors?

Lower vig directly impacts your long-term returns. A bettor placing $1,000 per week at a book with 4% vig loses roughly $40/week to the house edge. At 2% vig, that drops to $20/week — a $1,040 difference over a year. For serious bettors, shopping for lower vig is one of the most reliable ways to improve profitability.

What sportsbooks do you track?

We track both regulated US sportsbooks (DraftKings, FanDuel, BetMGM, Caesars) and offshore books (Bovada, BetOnline, MyBookie, BetUS, LowVig.ag, BetAnySports). Data comes from The Odds API, which aggregates real-time lines from licensed sources.

Caesars MiLB Odds

Q: Can I still compare sportsbooks for MiLB?

No live odds are currently available for MiLB. In the meantime, check out our odds comparison page for other available options, or visit our overall Vig Index for cross-sport rankings.

MiLB Odds Not Currently Available

MiLB does not currently have odds in our data feed. When odds for events are available at sportsbooks they will be listed here. This page updates 3× daily from The Odds API — when sportsbooks begin posting MiLB lines, the full analysis will become available.

In the meantime, check out our odds comparison page for other available options.

Not sure which sportsbook is right for you? Try the Sportsbook Selector — answer four questions and get a personalized recommendation backed by live vig data.

The Minor League Baseball season typically runs from early April through mid-September, with Triple-A and Double-A championships concluding by late September. The MiLB playoffs begin in mid-September for most leagues, though the Triple-A National Championship Game extends into early October. Preseason futures markets usually open in late February or early March, coinciding with spring training activities and affiliate assignments. Unlike MLB, MiLB betting markets remain relatively niche, with championship futures, team win totals, and divisional winners comprising the bulk of available wagers during the active season.

Off-season MiLB betting opportunities center heavily on organizational strength futures, particularly Triple-A Pacific Coast League and International League championship odds. Team win total markets become available once schedules are released in late January, typically offering 140-game season totals for Triple-A clubs. The MLB First-Year Player Draft in July creates unique prop betting scenarios around which organizations will field the strongest rookie-league teams, though these markets remain limited to specialized books. Player promotion props—betting on which prospects will reach the majors by specific dates—represent another growing off-season market, particularly for top-100 prospect movements between affiliate levels.

MiLB vig patterns show their loosest margins during the February-March preseason window, when books have limited information on roster compositions and managerial changes. Lines tighten considerably once the season begins, as the smaller betting pools make books more cautious about exposure. The biggest off-season odds movements typically follow MLB affiliate changes, which can completely reshape team talent levels overnight. Parent club farm system rankings, published by outlets like Baseball America in winter, drive significant line adjustments for championship futures. Weather-related schedule modifications and ballpark changes also create notable shifts in team win totals, particularly for leagues like the Pacific Coast League where altitude and climate factors heavily influence offensive numbers.

In-Season Sports

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How We Calculate These Numbers

Data Source: All odds on this page come from The Odds API, which aggregates real-time lines from licensed US and offshore sportsbooks. We track moneyline, spread, and totals markets across every sport with active betting lines.
Update Frequency: We pull a fresh snapshot of every tracked market three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds for a given event. The timestamp at the top of each page tells you exactly when the data was last refreshed.
Vig Calculation: Vig (short for vigorish, also called juice or overround) measures the margin a sportsbook builds into its odds. We calculate it by converting the odds on each side of a market to implied probabilities, summing those probabilities, and subtracting 100%. For example, a market priced at -110/-110 implies 52.38% on each side — a total of 104.76%, meaning a vig of 4.76%. Lower vig means better value for bettors because you keep more of your winnings.
Per-Market Breakdown: We compute vig separately for each market type: moneyline (h2h), point spreads, and totals (over/under). The "average vig" shown for each sportsbook is the mean across all market types weighted by the number of events sampled in each market.
Grading Scale: Every sportsbook receives a letter grade based on its average vig: A+ (under 2%) is exchange-level pricing. A (2–3%) is very competitive. B+ (3–4%) is above average. B (4–5%) is the industry standard — a -110/-110 line is 4.76%. C+ (5–6%) is slightly below average. C (6–7%) is below average. D (7–8%) is high vig. D− (8–10%) is very high vig. F (10%+) is predatory pricing. See the full Vig Index Methodology for formulas, worked examples, and known limitations.
Trend Tracking: We store daily snapshots for 30 days, allowing us to show 24-hour and 7-day vig trends. A downward trend (improving) means sportsbooks are tightening their lines — often in response to increased competition or higher betting volume as a season heats up.