Sports arbitrage by league, measured

For every game our scanner ingests, it compares the same line across 20+ US sportsbooks and records the cases where backing both sides at two books costs less than the payout. This is what that produced by sport over the last 30 days — counts, edge sizes and the books involved. Nothing is estimated.

Sport	Games with an arb	Game-markets	Detections	Avg net edge	Max net edge	Books measured	Avg vig	Last seen
NFL	31	32	24,481	1.64%	5.38%	20	5.10%	Sep 9, 2026
MLB	206	1,321	3,157	3.94%	14.98%	19	4.55%	Sep 9, 2026
NHL	5	5	573	0.76%	2.44%	16	4.95%	Sep 9, 2026
NBA	1	1	314	1.68%	1.68%	15	4.81%	Aug 26, 2026
MLS	25	37	54	4.27%	13.74%	11	6.35%	Sep 6, 2026

A “game-market” is one line of one game (e.g. total 8.5). Edges above 15% are excluded as line mismatches. Each sport page ranks the books by vig for that sport and lists the pairs that disagree most.

Frequently asked questions

Which sport has the most arbitrage opportunities?

Volume drives it: sports with many games and many independently-priced markets (spreads and totals at every line) produce the most disagreements. The table ranks the last 30 days from our archive — baseball's daily slate dominates in season, football's fewer games carry larger edges when they appear.

Why do spreads and totals see more arbitrage than moneylines?

Books move the line and the price on spreads and totals independently, and each alternate line is its own market. That multiplies the ways two books can end up quoting the same line at different prices. Moneylines are a single number per game and books copy each other faster.

Are these opportunities still available?

No — the pages record what the market did. Cross-book windows close within minutes as books react. The live dashboard shows what exists right now, refreshed every 15 minutes pre-game.