BetMGM vs FanDuel: where their odds disagree
Over the last 30 days, BetMGM and FanDuel quoted the same line at prices that summed to less than 100% on 71 game-markets — a cross-book arbitrage — with an average net edge of 3.08% and a peak of 14.43%. On plain vig, FanDuel is the cheaper book of the two. Last disagreement: Sep 19, 2026.
Vig: BetMGM vs FanDuel
| BetMGM | FanDuel | |
|---|---|---|
| Overall overround | 4.96% | 4.58% |
| Moneyline | 4.45% | 4.00% |
| Spreads | 4.65% | 4.84% |
| Totals | 5.58% | 4.90% |
| NFL | 4.39% | 4.57% |
| MLB | 4.81% | 4.56% |
| NBA | 4.60% | 4.50% |
| NHL | 4.56% | 4.85% |
| MLS | 8.73% | — |
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 |
|---|---|---|---|---|
| Toronto Blue Jays @ Texas Rangers · MLB | moneyline | Texas Rangers @ BetMGM + Toronto Blue Jays @ FanDuel | 2.25% | Sep 18, 9:36 PM ET |
| Philadelphia Phillies @ New York Mets · MLB | total 10.5 | Over @ FanDuel + Under @ BetMGM | 6.40% | Sep 18, 9:20 PM ET |
| Philadelphia Phillies @ New York Mets · MLB | spread 2.5 | New York Mets @ FanDuel + Philadelphia Phillies @ BetMGM | 3.33% | Sep 17, 9:49 PM ET |
| Boston Red Sox @ Texas Rangers · MLB | moneyline | Boston Red Sox @ FanDuel + Texas Rangers @ BetMGM | 1.54% | Sep 16, 9:45 PM ET |
| Milwaukee Brewers @ Pittsburgh Pirates · MLB | spread 2.5 | Milwaukee Brewers @ FanDuel + Pittsburgh Pirates @ BetMGM | 4.50% | Sep 16, 7:13 PM ET |
| New York Yankees @ Minnesota Twins · MLB | total 10.5 | Over @ FanDuel + Under @ BetMGM | 2.53% | Sep 16, 5:11 PM ET |
| Kansas City Royals @ Houston Astros · MLB | spread 1.5 | Houston Astros @ BetMGM + Kansas City Royals @ FanDuel | 1.65% | Sep 15, 10:34 PM ET |
| Philadelphia Phillies @ Washington Nationals · MLB | moneyline | Philadelphia Phillies @ BetMGM + Washington Nationals @ FanDuel | 1.69% | Sep 15, 10:19 PM ET |
| Philadelphia Phillies @ Washington Nationals · MLB | spread 1.5 | Philadelphia Phillies @ BetMGM + Washington Nationals @ FanDuel | 2.24% | Sep 15, 10:19 PM ET |
| San Diego Padres @ Colorado Rockies · MLB | spread 3.5 | Colorado Rockies @ BetMGM + San Diego Padres @ FanDuel | 1.74% | Sep 15, 9:02 PM ET |
| Seattle Mariners @ Los Angeles Angels · MLB | total 10.5 | Over @ BetMGM + Under @ FanDuel | 6.69% | Sep 15, 12:20 AM ET |
| Seattle Mariners @ Los Angeles Angels · MLB | moneyline | Los Angeles Angels @ FanDuel + Seattle Mariners @ BetMGM | 1.81% | Sep 15, 12:04 AM ET |
| Detroit Tigers @ Toronto Blue Jays · MLB | total 11.5 | Over @ FanDuel + Under @ BetMGM | 1.59% | Sep 14, 10:17 PM ET |
| Denver Broncos @ Kansas City Chiefs · NFL | moneyline | Denver Broncos @ FanDuel + Kansas City Chiefs @ BetMGM | 2.02% | Sep 14, 9:32 PM ET |
| Cincinnati Reds @ Milwaukee Brewers · MLB | moneyline | Cincinnati Reds @ BetMGM + Milwaukee Brewers @ FanDuel | 12.69% | Sep 13, 4:48 PM ET |
Frequently asked questions
How often do BetMGM and FanDuel disagree?
In the last 30 days our scanner recorded 71 game-markets where BetMGM and FanDuel quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 125 scans. The average net edge was 3.08% and the largest 14.43%.
Which has lower vig, BetMGM or FanDuel?
FanDuel — BetMGM measures 4.96% overall and FanDuel measures 4.58% 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 FanDuel disagree on most?
MLB (67 game-markets, avg 4.14%); NFL (3 game-markets, avg 5.10%); NBA (1 game-markets, avg 1.68%).
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