BetMGM vs ESPN BET: where their odds disagree
Over the last 30 days, BetMGM and ESPN BET quoted the same line at prices that summed to less than 100% on 42 game-markets — a cross-book arbitrage — with an average net edge of 3.56% and a peak of 14.95%. On plain vig, ESPN BET is the cheaper book of the two. Last disagreement: Sep 19, 2026.
Vig: BetMGM vs ESPN BET
| BetMGM | ESPN BET | |
|---|---|---|
| Overall overround | 4.96% | 4.55% |
| Moneyline | 4.45% | 4.12% |
| Spreads | 4.65% | 4.87% |
| Totals | 5.58% | 4.66% |
| NFL | 4.39% | 4.54% |
| MLB | 4.81% | 4.45% |
| NBA | 4.60% | 4.51% |
| NHL | 4.56% | 4.69% |
| 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 |
|---|---|---|---|---|
| Seattle Mariners @ Colorado Rockies · MLB | moneyline | Colorado Rockies @ BetMGM + Seattle Mariners @ ESPN BET | 14.95% | Sep 18, 10:37 PM ET |
| Athletics @ Cleveland Guardians · MLB | total 9.5 | Over @ ESPN BET + Under @ BetMGM | 4.75% | Sep 18, 9:20 PM ET |
| New York Yankees @ Minnesota Twins · MLB | spread 6.5 | Minnesota Twins @ BetMGM + New York Yankees @ ESPN BET | 9.12% | Sep 15, 10:34 PM ET |
| Boston Red Sox @ Texas Rangers · MLB | total 8.5 | Over @ BetMGM + Under @ ESPN BET | 2.12% | Sep 15, 10:04 PM ET |
| New York Yankees @ Minnesota Twins · MLB | total 8.5 | Over @ BetMGM + Under @ ESPN BET | 1.11% | Sep 15, 8:47 PM ET |
| Milwaukee Brewers @ Pittsburgh Pirates · MLB | spread 5.5 | Milwaukee Brewers @ BetMGM + Pittsburgh Pirates @ ESPN BET | 7.59% | Sep 15, 8:47 PM ET |
| Denver Broncos @ Kansas City Chiefs · NFL | total 41.5 | Over @ BetMGM + Under @ ESPN BET | 1.08% | Sep 14, 11:03 PM ET |
| Miami Dolphins @ Las Vegas Raiders · NFL | moneyline | Las Vegas Raiders @ BetMGM + Miami Dolphins @ ESPN BET | 0.24% | Sep 13, 5:19 PM ET |
| Washington Commanders @ Philadelphia Eagles · NFL | moneyline | Philadelphia Eagles @ BetMGM + Washington Commanders @ ESPN BET | 0.65% | Sep 13, 5:19 PM ET |
| Atlanta Falcons @ Pittsburgh Steelers · NFL | spread 7.5 | Atlanta Falcons @ ESPN BET + Pittsburgh Steelers @ BetMGM | 2.44% | Sep 13, 3:47 PM ET |
| Pittsburgh Pirates @ Chicago Cubs · MLB | total 6.5 | Over @ BetMGM + Under @ ESPN BET | 7.27% | Sep 13, 3:47 PM ET |
| Pittsburgh Pirates @ Chicago Cubs · MLB | spread 1.5 | Chicago Cubs @ ESPN BET + Pittsburgh Pirates @ BetMGM | 2.44% | Sep 13, 3:32 PM ET |
| Baltimore Orioles @ Toronto Blue Jays · MLB | total 7.5 | Over @ BetMGM + Under @ ESPN BET | 4.35% | Sep 13, 3:32 PM ET |
| Los Angeles Angels @ Washington Nationals · MLB | total 4.5 | Over @ BetMGM + Under @ ESPN BET | 1.93% | Sep 11, 9:02 PM ET |
| Colorado Rockies @ New York Yankees · MLB | total 12.5 | Over @ BetMGM + Under @ ESPN BET | 1.93% | Sep 10, 9:49 PM ET |
Frequently asked questions
How often do BetMGM and ESPN BET disagree?
In the last 30 days our scanner recorded 42 game-markets where BetMGM and ESPN BET quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 42 scans. The average net edge was 3.56% and the largest 14.95%.
Which has lower vig, BetMGM or ESPN BET?
ESPN BET — BetMGM measures 4.96% overall and ESPN BET measures 4.55% 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 ESPN BET disagree on most?
MLB (37 game-markets, avg 3.88%); NFL (5 game-markets, avg 1.23%).
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