BetUS vs DraftKings: where their odds disagree
Over the last 30 days, BetUS and DraftKings quoted the same line at prices that summed to less than 100% on 10 game-markets — a cross-book arbitrage — with an average net edge of 1.14% and a peak of 3.03%. On plain vig, DraftKings is the cheaper book of the two. Last disagreement: Sep 19, 2026.
Vig: BetUS vs DraftKings
| BetUS | DraftKings | |
|---|---|---|
| Overall overround | 4.64% | 4.54% |
| Moneyline | 3.31% | 4.28% |
| Spreads | 4.71% | 4.66% |
| Totals | 4.84% | 4.69% |
| NFL | 4.65% | 4.57% |
| MLB | 3.66% | 4.65% |
| NHL | 4.20% | 4.33% |
| MLS | 6.52% | — |
| NBA | — | 4.58% |
Disagreements by sport
| Sport | Game-markets | Avg net edge | Max net edge |
|---|---|---|---|
| MLB | 10 | 1.14% | 3.03% |
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 |
|---|---|---|---|---|
| Toronto Blue Jays @ Texas Rangers · MLB | moneyline | Texas Rangers @ BetUS + Toronto Blue Jays @ DraftKings | 3.03% | Sep 18, 8:19 PM ET |
| Philadelphia Phillies @ New York Mets · MLB | moneyline | New York Mets @ BetUS + Philadelphia Phillies @ DraftKings | 0.70% | Sep 17, 7:16 PM ET |
| Kansas City Royals @ Houston Astros · MLB | spread 1.5 | Houston Astros @ BetUS + Kansas City Royals @ DraftKings | 0.30% | Sep 15, 8:16 PM ET |
| Kansas City Royals @ Houston Astros · MLB | moneyline | Houston Astros @ BetUS + Kansas City Royals @ DraftKings | 1.45% | Sep 15, 8:16 PM ET |
| Los Angeles Angels @ Washington Nationals · MLB | moneyline | Los Angeles Angels @ DraftKings + Washington Nationals @ BetUS | 1.72% | Sep 13, 1:46 PM ET |
| Houston Astros @ Tampa Bay Rays · MLB | moneyline | Houston Astros @ DraftKings + Tampa Bay Rays @ BetUS | 0.27% | Sep 11, 7:14 PM ET |
| Cleveland Guardians @ Baltimore Orioles · MLB | spread 1.5 | Baltimore Orioles @ BetUS + Cleveland Guardians @ DraftKings | 1.53% | Sep 7, 1:43 PM ET |
| Tampa Bay Rays @ Texas Rangers · MLB | moneyline | Tampa Bay Rays @ DraftKings + Texas Rangers @ BetUS | 2.53% | Sep 4, 8:14 PM ET |
| Seattle Mariners @ Boston Red Sox · MLB | moneyline | Boston Red Sox @ BetUS + Seattle Mariners @ DraftKings | 0.30% | Sep 1, 3:46 PM ET |
| Arizona Diamondbacks @ San Francisco Giants · MLB | moneyline | Arizona Diamondbacks @ DraftKings + San Francisco Giants @ BetUS | 0.44% | Aug 28, 10:56 AM ET |
Frequently asked questions
How often do BetUS and DraftKings disagree?
In the last 30 days our scanner recorded 10 game-markets where BetUS and DraftKings quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 11 scans. The average net edge was 1.14% and the largest 3.03%.
Which has lower vig, BetUS or DraftKings?
DraftKings — BetUS measures 4.64% overall and DraftKings measures 4.54% 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 DraftKings disagree on most?
MLB (10 game-markets, avg 1.14%).
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