Minor League Baseball presents one of the most intriguing — and underexploited — betting markets in North American sports. With six full-season levels (Triple-A, Double-A, and four Single-A tiers under the current structure), the sheer volume of daily games during the season creates a sprawling marketplace. Scoring tends to run higher and more volatile than in the majors, driven by inconsistent pitching, smaller ballparks, and developmental lineups that can shift dramatically from night to night. Roster turnover is constant, with players being promoted, demoted, or reassigned on short notice, making it difficult for even sharp bettors to maintain a reliable edge without dedicated tracking.
Vig on MiLB lines tends to run significantly wider than what bettors encounter in MLB or other major sports markets. Because fewer books offer MiLB odds and public betting volume is relatively low, sportsbooks have less incentive to sharpen their lines. It's common to see moneyline juice pushed well beyond the standard -110/-110 baseline, with combined overround sometimes exceeding 8-10%. This makes shopping across multiple books especially critical — the difference between the best and worst available price on the same game can be substantial. Books that do post MiLB lines often vary considerably in their pricing models, creating genuine arbitrage-adjacent opportunities for bettors willing to compare.
The MiLB regular season typically runs from early April through mid-September, with playoff series extending into late September. Early-season lines tend to be the softest, as books have limited data on reshuffled rosters coming out of spring training. Midseason call-ups — particularly around the MLB trade deadline in late July and September roster expansions — can create significant value windows when lineups change faster than oddsmakers adjust. Weather is a persistent factor, especially in the lower levels where games are played in smaller markets with less climate-controlled infrastructure. Bettors should also track starting pitcher assignments closely, as MiLB rotations are far less predictable than their major league counterparts, and a single pitching change can swing a line by 30 cents or more.
Cross-Sport Vig Comparison
MiLB averages 6.86% vig across 7 sportsbooks. Here's how that compares to other active sports:
| Sport | Avg Vig | vs MiLB |
|---|---|---|
| MiLB | 6.86% | — |
| CFL | 5.00% | 1.86% higher |
| NCAAF | 4.71% | 2.16% higher |
| NFL | 4.72% | 2.14% higher |
| NFL Preseason | 4.40% | 2.47% higher |
Vig Rankings
| # | Sportsbook | Avg Vig | Grade | ML | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | Caesars | 6.08% | C | 6.56% | 4.70% | 6.90% | 15 |
| 2 | theScore Bet (ESPN Bet) | 6.34% | C | 6.56% | 5.64% | 6.82% | 15 |
| 3 | BetOnline.ag | 6.50% | C | 6.61% | 6.10% | 6.78% | 15 |
| 4 | Bovada | 6.74% | C | 6.63% | 6.69% | 6.89% | 15 |
| 5 | FanDuel | 6.78% | C | 5.99% | 7.26% | 7.08% | 15 |
| 6 | BetRivers | 7.69% | D | 7.64% | 7.71% | 7.73% | 15 |
| 7 | Hard Rock Bet | 7.92% | D | 6.62% | 8.21% | 8.93% | 5 |
Frequently Asked Questions
Which sportsbook has the lowest MiLB vig?
Caesars currently has the lowest vig at 6.08%, earning a grade of C.
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.
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.