BetMGM vs MyBookie: where their odds disagree
Over the last 30 days, BetMGM and MyBookie quoted the same line at prices that summed to less than 100% on 149 game-markets — a cross-book arbitrage — with an average net edge of 4.58% and a peak of 14.79%. On plain vig, BetMGM is the cheaper book of the two. Last disagreement: Sep 17, 2026.
Vig: BetMGM vs MyBookie
| BetMGM | MyBookie | |
|---|---|---|
| Overall overround | 4.96% | 5.96% |
| Moneyline | 4.45% | 5.14% |
| Spreads | 4.65% | 6.07% |
| Totals | 5.58% | 6.31% |
| NFL | 4.39% | 5.12% |
| MLB | 4.81% | 4.66% |
| NBA | 4.60% | — |
| NHL | 4.56% | — |
| MLS | 8.73% | 7.92% |
Disagreements by sport
How big the edges were
Share of detections by net edge bucket. Most cross-book edges are small; the tail is where the money and the execution risk both live.
Recent examples
Best detection per game-market, most recent first. These windows have closed.
| Game | Market | Legs | Net edge | Detected |
|---|---|---|---|---|
| Seattle Mariners @ Los Angeles Angels · MLB | spread 5.5 | Los Angeles Angels @ BetMGM + Seattle Mariners @ MyBookie | 9.94% | Sep 17, 12:01 AM ET |
| Boston Red Sox @ Texas Rangers · MLB | moneyline | Boston Red Sox @ MyBookie + Texas Rangers @ BetMGM | 11.86% | Sep 16, 9:30 PM ET |
| Milwaukee Brewers @ Pittsburgh Pirates · MLB | total 9.5 | Over @ MyBookie + Under @ BetMGM | 1.11% | Sep 16, 8:59 PM ET |
| Los Angeles Dodgers @ Cincinnati Reds · MLB | moneyline | Cincinnati Reds @ MyBookie + Los Angeles Dodgers @ BetMGM | 6.62% | Sep 16, 8:59 PM ET |
| Kansas City Royals @ Houston Astros · MLB | moneyline | Houston Astros @ MyBookie + Kansas City Royals @ BetMGM | 6.36% | Sep 16, 8:44 PM ET |
| Athletics @ Tampa Bay Rays · MLB | spread 1.5 | Athletics @ MyBookie + Tampa Bay Rays @ BetMGM | 14.14% | Sep 16, 8:44 PM ET |
| New York Yankees @ Minnesota Twins · MLB | moneyline | Minnesota Twins @ BetMGM + New York Yankees @ MyBookie | 3.23% | Sep 16, 3:55 PM ET |
| Kansas City Royals @ Houston Astros · MLB | total 7.5 | Over @ BetMGM + Under @ MyBookie | 4.47% | Sep 15, 10:04 PM ET |
| Atlanta Braves @ Chicago Cubs · MLB | moneyline | Atlanta Braves @ MyBookie + Chicago Cubs @ BetMGM | 10.80% | Sep 15, 10:04 PM ET |
| Baltimore Orioles @ New York Mets · MLB | total 5.5 | Over @ BetMGM + Under @ MyBookie | 3.02% | Sep 15, 9:33 PM ET |
| San Diego Padres @ Colorado Rockies · MLB | moneyline | Colorado Rockies @ BetMGM + San Diego Padres @ MyBookie | 1.56% | Sep 15, 9:02 PM ET |
| San Francisco Giants @ St. Louis Cardinals · MLB | spread 4.5 | San Francisco Giants @ BetMGM + St. Louis Cardinals @ MyBookie | 1.11% | Sep 15, 8:47 PM ET |
| Miami Marlins @ Arizona Diamondbacks · MLB | moneyline | Arizona Diamondbacks @ MyBookie + Miami Marlins @ BetMGM | 2.91% | Sep 15, 12:35 AM ET |
| San Diego Padres @ Colorado Rockies · MLB | total 15.5 | Over @ BetMGM + Under @ MyBookie | 4.47% | Sep 14, 11:18 PM ET |
| San Diego Padres @ Colorado Rockies · MLB | moneyline | Colorado Rockies @ MyBookie + San Diego Padres @ BetMGM | 11.10% | Sep 14, 11:03 PM ET |
Frequently asked questions
How often do BetMGM and MyBookie disagree?
In the last 30 days our scanner recorded 149 game-markets where BetMGM and MyBookie quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 172 scans. The average net edge was 4.58% and the largest 14.79%.
Which has lower vig, BetMGM or MyBookie?
BetMGM — BetMGM measures 4.96% overall and MyBookie measures 5.96% over 30 days of live lines. The per-market and per-sport breakdown is in the table above.
Does this mean I can make money betting both?
Not automatically. These are measurements of past disagreements at the moment they were detected. Lines move within minutes, displayed prices may not be available at your stake, both books must be accessible in your state, and neither book has to honor a stale price. ArbMonster shows the math; the execution and the risk are yours.
Which sports do BetMGM and MyBookie disagree on most?
MLB (142 game-markets, avg 4.56%); NFL (7 game-markets, avg 4.99%).
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