How Often Do Sportsbooks Misprice MLB Lines?
Live data — last updated 2026-07-05. Tracking since 2026-07-02.
How we measure this
Every 10 minutes from 9 AM to 11 PM ET, our scanner pulls moneyline, run line, and totals prices from DraftKings, FanDuel, BetMGM, BetRivers, Caesars and Hard Rock Bet, plus Pinnacle. We strip the vig from Pinnacle's two-way price to get a fair probability for each side, then flag any retail price whose expected value against that fair probability is +2% or better. For each flag we record the timestamp, book, price, and edge — and keep watching until the book corrects the line. Prices are compared only at identical lines for spreads and totals, so a "better price" is never an artifact of a different number.
How fast do books fix mistakes?
The median mispriced line lasts 10.5 minutes. 67% are corrected within 30 minutes (n=6). These windows are short by design: once sharp money or the book's own risk desk notices, the price snaps back to market. If you want to bet a mispriced line, speed is the whole game.
Which books and markets misprice most?
Every mispricing captured since 2026-07-02, broken down by sportsbook and by market type. Sample sizes are small early in tracking — this table grows daily.
| Sportsbook | Mispricings captured |
|---|---|
| FanDuel | 3 |
| BetRivers | 1 |
| BetMGM | 1 |
| DraftKings | 1 |
Mispricings of 2%+ EV vs Pinnacle no-vig fair value, 2026-07-02 through 2026-07-05.
| Market | Mispricings captured |
|---|---|
| Moneyline | 3 |
| Run line | 2 |
| Total (over/under) | 1 |
MLB markets scanned: moneyline, run line, and totals.
Do these edges win?
So far the flagged bets are 0-4 for −$400 at $100 flat stakes (-100% ROI).
This sample is far too small to judge — mathematically +EV bets can easily start 0-for-4. Closing line value, not short-term results, is the test; we publish the record either way because that's the standard we hold everyone else to.
Frequently asked questions
Why compare against Pinnacle?
Pinnacle is the sharpest sportsbook in the world: it posts the lowest vig, takes the largest limits, and welcomes winning bettors instead of banning them, so its prices absorb the most informed money. Stripping the vig from Pinnacle's two-way price is the industry-standard way to estimate a bet's fair probability.
Why do retail sportsbooks misprice lines?
Retail books react slower to news and sharp money (steam), price some markets for marketing appeal rather than accuracy, and spread their attention across thousands of simultaneous markets. Brief mispricings are the inevitable result — which is why they exist at all, and why they get corrected quickly once noticed.
Can I bet these mispriced lines?
Yes, while they last — the edges are real prices at real US sportsbooks, but most are corrected within minutes to hours. Dr. TrueLine members get an instant push notification with the exact bet, book, price, and edge percentage the moment the scanner flags one.