Courtside vs Fliff: where their odds disagree
Over the last 30 days, Courtside and Fliff quoted the same line at prices that summed to less than 100% on 3 game-markets — a cross-book arbitrage — with an average net edge of 5.86% and a peak of 9.78%. On plain vig, Courtside is the cheaper book of the two. Last disagreement: Sep 17, 2026.
Vig: Courtside vs Fliff
| Courtside | Fliff | |
|---|---|---|
| Overall overround | 4.03% | 6.23% |
| Moneyline | 3.58% | 5.61% |
| Spreads | 3.90% | 6.49% |
| Totals | 5.50% | 6.50% |
| NFL | 3.69% | 6.07% |
| MLB | 4.39% | 6.13% |
| MLS | — | 9.87% |
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 |
|---|---|---|---|---|
| Milwaukee Brewers @ Pittsburgh Pirates · MLB | spread 1.5 | Milwaukee Brewers @ Fliff + Pittsburgh Pirates @ Courtside | 2.93% | Sep 16, 9:30 PM ET |
| Milwaukee Brewers @ Pittsburgh Pirates · MLB | moneyline | Milwaukee Brewers @ Fliff + Pittsburgh Pirates @ Courtside | 9.78% | Sep 16, 9:30 PM ET |
| Miami Dolphins @ Las Vegas Raiders · NFL | spread 14.5 | Las Vegas Raiders @ Fliff + Miami Dolphins @ Courtside | 4.86% | Sep 13, 7:20 PM ET |
Frequently asked questions
How often do Courtside and Fliff disagree?
In the last 30 days our scanner recorded 3 game-markets where Courtside and Fliff quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 3 scans. The average net edge was 5.86% and the largest 9.78%.
Which has lower vig, Courtside or Fliff?
Courtside — Courtside measures 4.03% overall and Fliff measures 6.23% 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 Fliff disagree on most?
MLB (2 game-markets, avg 6.35%); NFL (1 game-markets, avg 4.86%).
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