betPARX vs Courtside: where their odds disagree
Over the last 30 days, betPARX and Courtside quoted the same line at prices that summed to less than 100% on 8 game-markets — a cross-book arbitrage — with an average net edge of 3.83% and a peak of 12.86%. On plain vig, Courtside is the cheaper book of the two. Last disagreement: Sep 18, 2026.
Vig: betPARX vs Courtside
| betPARX | Courtside | |
|---|---|---|
| Overall overround | 5.24% | 4.03% |
| Moneyline | 4.76% | 3.58% |
| Spreads | 5.08% | 3.90% |
| Totals | 5.66% | 5.49% |
| NFL | 4.89% | 3.69% |
| MLB | 5.31% | 4.38% |
| NBA | 4.84% | — |
| NHL | 5.13% | — |
| MLS | 6.46% | — |
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 | moneyline | Boston Red Sox @ betPARX + Tampa Bay Rays @ Courtside | 0.30% | Sep 18, 3:24 PM ET |
| Seattle Mariners @ Los Angeles Angels · MLB | total 3.5 | Over @ betPARX + Under @ Courtside | 2.65% | Sep 16, 12:21 AM ET |
| Baltimore Orioles @ New York Mets · MLB | total 7.5 | Over @ Courtside + Under @ betPARX | 1.16% | Sep 15, 9:48 PM ET |
| Chicago White Sox @ Cleveland Guardians · MLB | spread 1.5 | Chicago White Sox @ betPARX + Cleveland Guardians @ Courtside | 6.24% | Sep 15, 9:18 PM ET |
| Carolina Panthers @ Atlanta Falcons · NFL | moneyline | Atlanta Falcons @ Courtside + Carolina Panthers @ betPARX | 0.31% | Sep 15, 11:03 AM ET |
| Miami Marlins @ Arizona Diamondbacks · MLB | moneyline | Arizona Diamondbacks @ betPARX + Miami Marlins @ Courtside | 12.86% | Sep 14, 11:18 PM ET |
| New Orleans Saints @ Baltimore Ravens · NFL | moneyline | Baltimore Ravens @ Courtside + New Orleans Saints @ betPARX | 1.45% | Sep 14, 11:03 AM ET |
| Los Angeles Dodgers @ Miami Marlins · MLB | moneyline | Los Angeles Dodgers @ betPARX + Miami Marlins @ Courtside | 8.04% | Sep 13, 2:17 PM ET |
Frequently asked questions
How often do betPARX and Courtside disagree?
In the last 30 days our scanner recorded 8 game-markets where betPARX and Courtside quoted the same line at prices whose implied probabilities summed to less than 100% — a cross-book arbitrage — across 9 scans. The average net edge was 3.83% and the largest 12.86%.
Which has lower vig, betPARX or Courtside?
Courtside — betPARX measures 5.24% overall and Courtside measures 4.03% 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 betPARX and Courtside disagree on most?
MLB (6 game-markets, avg 5.21%); NFL (2 game-markets, avg 1.07%).
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