BetUS vs FanDuel: where their odds disagree
Over the last 30 days, BetUS and FanDuel quoted the same line at prices that summed to less than 100% on 14 game-markets — a cross-book arbitrage — with an average net edge of 2.88% and a peak of 10.72%. On plain vig, FanDuel is the cheaper book of the two. Last disagreement: Sep 16, 2026.
Vig: BetUS vs FanDuel
| BetUS | FanDuel | |
|---|---|---|
| Overall overround | 4.64% | 4.58% |
| Moneyline | 3.31% | 4.00% |
| Spreads | 4.71% | 4.84% |
| Totals | 4.84% | 4.90% |
| NFL | 4.65% | 4.57% |
| MLB | 3.66% | 4.56% |
| NHL | 4.20% | 4.85% |
| MLS | 6.52% | — |
| NBA | — | 4.50% |
Disagreements by sport
| Sport | Game-markets | Avg net edge | Max net edge |
|---|---|---|---|
| MLB | 14 | 2.88% | 10.72% |
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 |
|---|---|---|---|---|
| Boston Red Sox @ Texas Rangers · MLB | total 7.5 | Over @ FanDuel + Under @ BetUS | 2.25% | Sep 15, 8:16 PM ET |
| Baltimore Orioles @ New York Mets · MLB | moneyline | Baltimore Orioles @ FanDuel + New York Mets @ BetUS | 2.53% | Sep 15, 7:15 PM ET |
| Chicago Cubs @ Milwaukee Brewers · MLB | moneyline | Chicago Cubs @ FanDuel + Milwaukee Brewers @ BetUS | 2.11% | Sep 9, 7:49 PM ET |
| Arizona Diamondbacks @ Kansas City Royals · MLB | moneyline | Arizona Diamondbacks @ FanDuel + Kansas City Royals @ BetUS | 6.78% | Sep 8, 7:51 PM ET |
| Arizona Diamondbacks @ Kansas City Royals · MLB | total 9.5 | Over @ BetUS + Under @ FanDuel | 1.08% | Sep 8, 2:12 AM ET |
| Los Angeles Angels @ Boston Red Sox · MLB | moneyline | Boston Red Sox @ BetUS + Los Angeles Angels @ FanDuel | 0.48% | Sep 7, 1:43 PM ET |
| Washington Nationals @ Los Angeles Dodgers · MLB | moneyline | Los Angeles Dodgers @ BetUS + Washington Nationals @ FanDuel | 2.63% | Sep 5, 9:18 PM ET |
| Chicago Cubs @ Miami Marlins · MLB | moneyline | Chicago Cubs @ FanDuel + Miami Marlins @ BetUS | 6.00% | Sep 5, 4:25 PM ET |
| New York Yankees @ Los Angeles Angels · MLB | moneyline | Los Angeles Angels @ BetUS + New York Yankees @ FanDuel | 0.92% | Aug 31, 9:40 PM ET |
| Miami Marlins @ Washington Nationals · MLB | moneyline | Miami Marlins @ FanDuel + Washington Nationals @ BetUS | 1.23% | Aug 31, 6:51 PM ET |
| Milwaukee Brewers @ New York Mets · MLB | moneyline | Milwaukee Brewers @ FanDuel + New York Mets @ BetUS | 2.50% | Aug 26, 7:22 PM ET |
| Tampa Bay Rays @ Detroit Tigers · MLB | moneyline | Detroit Tigers @ BetUS + Tampa Bay Rays @ FanDuel | 0.66% | Aug 25, 6:52 PM ET |
| Texas Rangers @ Chicago White Sox · MLB | moneyline | Chicago White Sox @ FanDuel + Texas Rangers @ BetUS | 10.72% | Aug 24, 7:51 PM ET |
| Tampa Bay Rays @ Baltimore Orioles · MLB | moneyline | Baltimore Orioles @ BetUS + Tampa Bay Rays @ FanDuel | 0.44% | Aug 23, 2:10 AM ET |
Frequently asked questions
How often do BetUS and FanDuel disagree?
In the last 30 days our scanner recorded 14 game-markets where BetUS and FanDuel quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 14 scans. The average net edge was 2.88% and the largest 10.72%.
Which has lower vig, BetUS or FanDuel?
FanDuel — BetUS measures 4.64% 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 BetUS and FanDuel disagree on most?
MLB (14 game-markets, avg 2.88%).
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