BetRivers vs BetUS: where their odds disagree
Over the last 30 days, BetRivers and BetUS 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 0.46% and a peak of 0.94%. On plain vig, BetUS is the cheaper book of the two. Last disagreement: Sep 9, 2026.
Vig: BetRivers vs BetUS
| BetRivers | BetUS | |
|---|---|---|
| Overall overround | 5.44% | 4.64% |
| Moneyline | 4.98% | 3.31% |
| Spreads | 5.33% | 4.71% |
| Totals | 5.81% | 4.84% |
| NFL | 5.00% | 4.65% |
| MLB | 5.36% | 3.66% |
| NBA | 5.57% | — |
| NHL | 5.52% | 4.20% |
| MLS | 6.44% | 6.52% |
Disagreements by sport
| Sport | Game-markets | Avg net edge | Max net edge |
|---|---|---|---|
| MLB | 6 | 0.46% | 0.94% |
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 |
|---|---|---|---|---|
| St. Louis Cardinals @ San Francisco Giants · MLB | moneyline | San Francisco Giants @ BetUS + St. Louis Cardinals @ BetRivers | 0.30% | Sep 9, 6:33 AM ET |
| Boston Red Sox @ Baltimore Orioles · MLB | moneyline | Baltimore Orioles @ BetUS + Boston Red Sox @ BetRivers | 0.51% | Sep 4, 10:32 PM ET |
| Baltimore Orioles @ Colorado Rockies · MLB | moneyline | Baltimore Orioles @ BetUS + Colorado Rockies @ BetRivers | 0.52% | Aug 31, 6:35 PM ET |
| Pittsburgh Pirates @ St. Louis Cardinals · MLB | moneyline | Pittsburgh Pirates @ BetRivers + St. Louis Cardinals @ BetUS | 0.41% | Aug 27, 11:29 PM ET |
| Los Angeles Dodgers @ Atlanta Braves · MLB | moneyline | Atlanta Braves @ BetRivers + Los Angeles Dodgers @ BetUS | 0.23% | Aug 27, 4:22 PM ET |
| Cincinnati Reds @ Arizona Diamondbacks · MLB | spread 1.5 | Arizona Diamondbacks @ BetRivers + Cincinnati Reds @ BetUS | 0.94% | Aug 23, 2:40 PM ET |
Frequently asked questions
How often do BetRivers and BetUS disagree?
In the last 30 days our scanner recorded 6 game-markets where BetRivers and BetUS quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 7 scans. The average net edge was 0.46% and the largest 0.94%.
Which has lower vig, BetRivers or BetUS?
BetUS — BetRivers measures 5.44% overall and BetUS measures 4.64% 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 BetRivers and BetUS disagree on most?
MLB (6 game-markets, avg 0.46%).
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