The top 6 books are tightly clustered — only 0.42% separates them. The spread between #1 and #15 is 4.23% — book choice matters significantly for MLB Preseason.
MLB Spring Training presents one of the most challenging betting environments in all of sports. Unlike the regular season, where established rotations and set lineups create relatively predictable outcomes, preseason games feature a revolving door of players. Starters often play just two or three innings before giving way to minor league hopefuls and roster-bubble players, making game outcomes highly volatile. Managers are focused on evaluation, not winning — they'll pull a dominant pitcher after 50 pitches or stack a lineup with prospects to assess depth. This fundamental disconnect between competitive intent and betting markets creates unique inefficiencies, but also significant risk for bettors who approach these games with regular-season assumptions.
Vig on MLB Spring Training lines tends to run noticeably wider than during the regular season. Sportsbooks face the same uncertainty bettors do — incomplete information about lineups (which are often released late or change without notice), inconsistent pitching usage, and small sample sizes make it difficult to set sharp lines. Books compensate for this uncertainty by building in larger margins, particularly on totals and runlines. Moneyline markets can carry significant juice on favorites, and the overall market depth is thinner, with fewer books offering full slates and some omitting certain games entirely. Bettors comparing odds across sportsbooks during Spring Training will frequently find wider discrepancies between offerings, making line shopping particularly valuable during this window.
Spring Training typically runs from late February through late March, with games played primarily in Florida's Grapefruit League and Arizona's Cactus League. Early in camp, games are especially unpredictable as teams experiment freely, and vig tends to be at its widest. As Opening Day approaches, lineups and rotations begin to crystallize, and books can price games with more confidence — margins generally tighten in the final week or two. Key factors to monitor include confirmed starting pitchers and their planned pitch counts, announced lineup cards, weather conditions (particularly wind and temperature in Arizona's desert parks), and whether teams are treating a late-March game as a dress rehearsal or still prioritizing evaluation. Bettors who track these details closely and shop aggressively for the best lines can extract meaningful edges from an otherwise opaque market.
Analysis updated October 11, 2026. Odds data above refreshes hourly.
MLB Preseason Sportsbook Vig Rankings
| # | Sportsbook | Avg Vig | Grade | Moneyline | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | BetAnything | 4.13% | B | 3.99% | 3.63% | 4.76% | 1 |
| 2 | LowVig.ag | 4.39% | B | 4.01% | — | 4.76% | 1 |
| 3 | BetOnline.ag | 4.39% | B | 4.01% | — | 4.76% | 1 |
| 4 | Caesars | 4.47% | B | 4.51% | 4.14% | 4.76% | 1 |
| 5 | Bovada | 4.50% | B | 4.41% | 4.34% | 4.76% | 1 |
| 6 | DraftKings | 4.55% | B | 4.33% | — | 4.76% | 1 |
| 7 | theScore Bet (ESPN Bet) | 4.79% | B | 5.28% | 4.34% | 4.76% | 1 |
| 8 | MyBookie.ag | 5.06% | C+ | 5.03% | 5.16% | 4.99% | 1 |
| 9 | FanDuel | 5.41% | C+ | 5.13% | 5.44% | 5.65% | 1 |
| 10 | BetUS | 5.82% | C+ | 4.80% | 5.70% | 6.98% | 1 |
| 11 | Hard Rock Bet | 6.42% | C | 5.77% | 6.52% | 6.98% | 1 |
| 12 | BetRivers | 7.65% | D | 7.82% | 7.39% | 7.74% | 1 |
| 13 | betPARX | 7.65% | D | 7.82% | 7.39% | 7.74% | 1 |
| 14 | Fliff | 8.06% | D- | 6.75% | 8.33% | 9.09% | 1 |
| 15 | ReBet | 8.36% | D- | 8.92% | 8.12% | 8.05% | 1 |
Best Line Leaders
Which sportsbook offers the best odds most often across 1 events:
| # | Sportsbook | Best Lines |
|---|---|---|
| 1 | Bovada | 2 |
| 2 | LowVig.ag | 2 |
| 3 | FanDuel | 2 |
| 4 | BetAnything | 1 |
| 5 | Caesars | 1 |
Frequently Asked Questions
Which sportsbook has the lowest vig for MLB Preseason?
BetAnything currently has the lowest average vig for MLB Preseason at 4.13%, earning a grade of B.
How do sportsbook odds compare for MLB Preseason?
We compare 15 sportsbooks for MLB Preseason. The vig ranges from 4.13% (BetAnything) to 8.36% (ReBet).
When do small vig differences matter for MLB Preseason?
The top two books (BetAnything and LowVig.ag) are separated by just 0.26%. While small, this adds up over volume — a bettor placing $1,000/week saves roughly $3 per week by choosing the lower-vig book.
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 every hour, on the hour (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 average vig: A+ (under 2%) is exchange-level pricing, A (2–3%) very competitive, B+ (3–4%) above average, B (4–5%) the industry standard, C+ (5–6%) slightly below average, C (6–7%) below average, D (7–8%) high vig, D− (8–10%) very high, F (10%+) predatory.
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, BetAnything). 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 every hour, on the hour (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.