betPARX vs BetRivers: where their odds disagree
Over the last 30 days, betPARX and BetRivers quoted the same line at prices that summed to less than 100% on 5 game-markets — a cross-book arbitrage — with an average net edge of 7.08% and a peak of 12.47%. On plain vig, betPARX is the cheaper book of the two. Last disagreement: Sep 13, 2026.
Vig: betPARX vs BetRivers
| betPARX | BetRivers | |
|---|---|---|
| Overall overround | 5.24% | 5.44% |
| Moneyline | 4.76% | 4.98% |
| Spreads | 5.08% | 5.33% |
| Totals | 5.66% | 5.81% |
| NFL | 4.89% | 5.00% |
| MLB | 5.31% | 5.36% |
| NBA | 4.84% | 5.57% |
| NHL | 5.13% | 5.52% |
| MLS | 6.46% | 6.44% |
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 |
|---|---|---|---|---|
| Miami Dolphins @ Las Vegas Raiders · NFL | spread 15.5 | Las Vegas Raiders @ betPARX + Miami Dolphins @ BetRivers | 12.47% | Sep 13, 7:35 PM ET |
| Seattle Mariners @ Athletics · MLB | spread 18.5 | Athletics @ betPARX + Seattle Mariners @ BetRivers | 8.50% | Sep 13, 12:17 AM ET |
| St. Louis Cardinals @ San Francisco Giants · MLB | total 9.5 | Over @ BetRivers + Under @ betPARX | 11.42% | Sep 7, 11:39 PM ET |
| Minnesota Twins @ Chicago White Sox · MLB | spread 3.0 | Chicago White Sox @ BetRivers + Minnesota Twins @ betPARX | 1.52% | Sep 6, 8:27 PM ET |
| Seattle Mariners @ Boston Red Sox · MLB | spread 7.0 | Boston Red Sox @ betPARX + Seattle Mariners @ BetRivers | 1.50% | Sep 2, 6:19 PM ET |
Frequently asked questions
How often do betPARX and BetRivers disagree?
In the last 30 days our scanner recorded 5 game-markets where betPARX and BetRivers quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 5 scans. The average net edge was 7.08% and the largest 12.47%.
Which has lower vig, betPARX or BetRivers?
betPARX — betPARX measures 5.24% overall and BetRivers measures 5.44% 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 betPARX and BetRivers disagree on most?
MLB (4 game-markets, avg 5.73%); NFL (1 game-markets, avg 12.47%).
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