Bally Bet vs ESPN BET: where their odds disagree
Over the last 30 days, Bally Bet and ESPN BET quoted the same line at prices that summed to less than 100% on 6 game-markets — a cross-book arbitrage — with an average net edge of 6.07% and a peak of 14.85%. On plain vig, ESPN BET is the cheaper book of the two. Last disagreement: Sep 19, 2026.
Vig: Bally Bet vs ESPN BET
| Bally Bet | ESPN BET | |
|---|---|---|
| Overall overround | 5.29% | 4.55% |
| Moneyline | 4.81% | 4.12% |
| Spreads | 5.14% | 4.87% |
| Totals | 5.70% | 4.66% |
| NFL | 4.89% | 4.54% |
| MLB | 5.51% | 4.45% |
| NBA | 4.84% | 4.51% |
| NHL | 5.13% | 4.69% |
| MLS | 6.48% | — |
Disagreements by sport
| Sport | Game-markets | Avg net edge | Max net edge |
|---|---|---|---|
| MLB | 6 | 6.07% | 14.85% |
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 |
|---|---|---|---|---|
| Miami Marlins @ San Diego Padres · MLB | spread 1.5 | Miami Marlins @ ESPN BET + San Diego Padres @ Bally Bet | 12.92% | Sep 18, 11:07 PM ET |
| Toronto Blue Jays @ Texas Rangers · MLB | spread 5.5 | Texas Rangers @ ESPN BET + Toronto Blue Jays @ Bally Bet | 14.85% | Sep 18, 11:07 PM ET |
| Baltimore Orioles @ New York Mets · MLB | total 9.5 | Over @ ESPN BET + Under @ Bally Bet | 0.30% | Sep 16, 6:58 PM ET |
| Cincinnati Reds @ Milwaukee Brewers · MLB | total 8.5 | Over @ ESPN BET + Under @ Bally Bet | 1.74% | Sep 13, 5:37 AM ET |
| Cleveland Guardians @ Baltimore Orioles · MLB | total 8.5 | Over @ ESPN BET + Under @ Bally Bet | 0.84% | Sep 6, 3:39 PM ET |
| Colorado Rockies @ Washington Nationals · MLB | spread 1.5 | Colorado Rockies @ Bally Bet + Washington Nationals @ ESPN BET | 5.76% | Aug 25, 8:55 PM ET |
Frequently asked questions
How often do Bally Bet and ESPN BET disagree?
In the last 30 days our scanner recorded 6 game-markets where Bally Bet and ESPN BET quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 6 scans. The average net edge was 6.07% and the largest 14.85%.
Which has lower vig, Bally Bet or ESPN BET?
ESPN BET — Bally Bet measures 5.29% 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 Bally Bet and ESPN BET disagree on most?
MLB (6 game-markets, avg 6.07%).
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