How our middles
actually landed
A middle is an over at one book and an under at another with a gap between the lines. If the result lands in the gap, both bets win. Every middle Betravon flagged is graded here at the prices it had when it was first flagged, against the player's real result. Players who didn't play are left out.
At 259 middles, chance alone can move the landing rate about 5 points either way, so a gap smaller than that isn't an edge yet. Most middles cost a little at the books' odds; the return is what they made at the posted prices, before any exchange fees.
By the chance the prices gave them
If the books' prices are right, each row lands about as often as they predicted.
| Predicted | Middles | Predicted | Landed | Return |
|---|---|---|---|---|
| Under 15% | 70 | 7.5% | 11.4% | +6.9% |
| 15–25% | 30 | 19.7% | 6.7% | −6.2% |
| 25–35% | 39 | 28.8% | 33.3% | +5.8% |
| 35% or more | 120 | 43.9% | 38.3% | −2.7% |
By sport
| Sport | Middles | Predicted | Landed | Return |
|---|---|---|---|---|
  MLB | 122 | 41.0% | 36.1% | −2.1% |
  NFL | 77 | 14.4% | 10.4% | −2.4% |
  WNBA | 34 | 29.5% | 35.3% | +11.0% |
Sports with fewer than 30 settled middles aren't listed.
259 of these were flagged before Betravon stored each middle's predicted chance; for those it's rebuilt from the two prices with the books' margin left in, which reads slightly high. Updated Wed 3:11 PM ET. What is a middle?
See tonight's middles
Betravon flags every middle across sportsbooks, pick'em apps and prediction markets as it opens, with its chance and its cost at market odds.