Courtside vs FanDuel: where their odds disagree
Over the last 30 days, Courtside 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 0.45% and a peak of 9.03%. On plain vig, Courtside is the cheaper book of the two. Last disagreement: Sep 17, 2026.
Vig: Courtside vs FanDuel
| Courtside | FanDuel | |
|---|---|---|
| Overall overround | 4.03% | 4.58% |
| Moneyline | 3.58% | 4.00% |
| Spreads | 3.90% | 4.84% |
| Totals | 5.50% | 4.90% |
| NFL | 3.69% | 4.57% |
| MLB | 4.39% | 4.56% |
| NBA | — | 4.50% |
| NHL | — | 4.85% |
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 |
|---|---|---|---|---|
| Boston Red Sox @ Tampa Bay Rays · MLB | total 7.5 | Over @ FanDuel + Under @ Courtside | 0.57% | Sep 17, 3:27 PM ET |
| Miami Marlins @ Arizona Diamondbacks · MLB | total 7.5 | Over @ FanDuel + Under @ Courtside | 4.32% | Sep 17, 12:32 AM ET |
| Atlanta Braves @ Chicago Cubs · MLB | total 9.5 | Over @ Courtside + Under @ FanDuel | 1.47% | Sep 16, 9:45 PM ET |
| Philadelphia Phillies @ Washington Nationals · MLB | moneyline | Philadelphia Phillies @ Courtside + Washington Nationals @ FanDuel | 1.91% | Sep 15, 10:04 PM ET |
| Philadelphia Phillies @ Washington Nationals · MLB | spread 1.5 | Philadelphia Phillies @ Courtside + Washington Nationals @ FanDuel | 2.73% | Sep 15, 10:04 PM ET |
| Milwaukee Brewers @ Pittsburgh Pirates · MLB | total 6.5 | Over @ FanDuel + Under @ Courtside | 5.12% | Sep 15, 9:33 PM ET |
| Carolina Panthers @ Atlanta Falcons · NFL | moneyline | Atlanta Falcons @ Courtside + Carolina Panthers @ FanDuel | 0.31% | Sep 15, 10:47 AM ET |
| Cleveland Browns @ Tampa Bay Buccaneers · NFL | moneyline | Cleveland Browns @ FanDuel + Tampa Bay Buccaneers @ Courtside | 0.75% | Sep 15, 6:27 AM ET |
| Baltimore Orioles @ New York Mets · MLB | moneyline | New York Mets @ FanDuel + Baltimore Orioles @ Courtside | 6.33% | Sep 14, 10:02 PM ET |
| Los Angeles Dodgers @ Cincinnati Reds · MLB | total 8.5 | Over @ Courtside + Under @ FanDuel | 0.22% | Sep 14, 3:22 PM ET |
| Philadelphia Eagles @ Tennessee Titans · NFL | moneyline | Philadelphia Eagles @ Courtside + Tennessee Titans @ FanDuel | 0.93% | Sep 13, 9:37 PM ET |
| Las Vegas Raiders @ Los Angeles Chargers · NFL | moneyline | Las Vegas Raiders @ FanDuel + Los Angeles Chargers @ Courtside | 1.56% | Sep 13, 8:06 PM ET |
| Pittsburgh Pirates @ Chicago Cubs · MLB | moneyline | Chicago Cubs @ FanDuel + Pittsburgh Pirates @ Courtside | 9.03% | Sep 13, 5:18 PM ET |
| New Orleans Saints @ Baltimore Ravens · NFL | moneyline | Baltimore Ravens @ Courtside + New Orleans Saints @ FanDuel | 0.75% | Sep 13, 1:01 PM ET |
Frequently asked questions
How often do Courtside and FanDuel disagree?
In the last 30 days our scanner recorded 14 game-markets where Courtside and FanDuel quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 242 scans. The average net edge was 0.45% and the largest 9.03%.
Which has lower vig, Courtside or FanDuel?
Courtside — Courtside measures 4.03% 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 Courtside and FanDuel disagree on most?
MLB (9 game-markets, avg 3.52%); NFL (5 game-markets, avg 0.33%).
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