Courtside vs ESPN BET: where their odds disagree
Over the last 30 days, Courtside and ESPN BET quoted the same line at prices that summed to less than 100% on 7 game-markets — a cross-book arbitrage — with an average net edge of 0.96% and a peak of 14.87%. On plain vig, Courtside is the cheaper book of the two. Last disagreement: Sep 16, 2026.
Vig: Courtside vs ESPN BET
| Courtside | ESPN BET | |
|---|---|---|
| Overall overround | 4.03% | 4.55% |
| Moneyline | 3.58% | 4.12% |
| Spreads | 3.90% | 4.87% |
| Totals | 5.49% | 4.66% |
| NFL | 3.69% | 4.54% |
| MLB | 4.38% | 4.45% |
| NBA | — | 4.51% |
| NHL | — | 4.69% |
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 @ San Francisco 49ers · NFL | moneyline | Miami Dolphins @ ESPN BET + San Francisco 49ers @ Courtside | 0.52% | Sep 16, 3:40 PM ET |
| Atlanta Braves @ Chicago Cubs · MLB | total 9.5 | Over @ Courtside + Under @ ESPN BET | 14.87% | Sep 15, 10:34 PM ET |
| Cleveland Browns @ Tampa Bay Buccaneers · NFL | moneyline | Cleveland Browns @ ESPN BET + Tampa Bay Buccaneers @ Courtside | 0.75% | Sep 15, 1:21 AM ET |
| Miami Marlins @ Arizona Diamondbacks · MLB | total 13.5 | Over @ ESPN BET + Under @ Courtside | 3.65% | Sep 14, 11:18 PM ET |
| San Francisco Giants @ St. Louis Cardinals · MLB | total 3.5 | Over @ ESPN BET + Under @ Courtside | 2.72% | Sep 14, 10:33 PM ET |
| New Orleans Saints @ Baltimore Ravens · NFL | moneyline | Baltimore Ravens @ Courtside + New Orleans Saints @ ESPN BET | 0.75% | Sep 14, 1:20 PM ET |
| Washington Commanders @ Philadelphia Eagles · NFL | moneyline | Philadelphia Eagles @ Courtside + Washington Commanders @ ESPN BET | 0.51% | Sep 13, 3:47 PM ET |
Frequently asked questions
How often do Courtside and ESPN BET disagree?
In the last 30 days our scanner recorded 7 game-markets where Courtside and ESPN BET quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 42 scans. The average net edge was 0.96% and the largest 14.87%.
Which has lower vig, Courtside or ESPN BET?
Courtside — Courtside measures 4.03% overall and ESPN BET measures 4.55% 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 ESPN BET disagree on most?
NFL (4 game-markets, avg 0.49%); MLB (3 game-markets, avg 7.08%).
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