MLB has 2 matches on Sunday, September 13. Below is the full slate with bookmaker prices and the probabilities those prices imply once the margin is removed.
Fixtures and odds
| UTC | Match | Home | Away | Implied |
|---|---|---|---|---|
| 00:11 | Arizona Diamondbacks vs Texas Rangers | 1.68 | 2.17 | 56.3% / 43.7% |
| 01:41 | Athletics vs Seattle Mariners | 2.41 | 1.56 | 39.4% / 60.6% |
Odds are decimal, averaged across 9 books (BetOnline.ag, 888sport, Unibet (FR), Winamax (FR), Winamax (DE), 1xBet). "Implied" strips the bookmaker margin so the numbers add up to 100%.
Match by match
Arizona Diamondbacks vs Texas Rangers
00:11 UTC · Chase Field, Phoenix · Season record: Arizona Diamondbacks 78-69 / Texas Rangers 72-75
The market leans Arizona Diamondbacks at 56.3%. Prices come from 9 books, and they differ by 10.7% on the widest side.
Athletics vs Seattle Mariners
01:41 UTC · Sutter Health Park, Sacramento · Season record: Athletics 59-88 / Seattle Mariners 69-78
The market leans Seattle Mariners at 60.6%. Prices come from 9 books, and they differ by 10.7% on the widest side.
What the market is saying
- Closest on paper — Arizona Diamondbacks vs Texas Rangers: 56.3% vs 43.7%.
- Most one-sided — Athletics vs Seattle Mariners: the market gives Seattle Mariners 60.6%.
- Where books disagree most — Arizona Diamondbacks vs Texas Rangers: 10.7% between the best and worst price.
- Average bookmaker margin — 5.4% across the slate.
Reading the slate
The Arizona-Texas matchup presents as the tighter contest on the Sunday slate, with the Diamondbacks priced at just over even money at 56.3% implied probability. The 5.4% margin between the two teams reflects genuine uncertainty in the market, and the 10.7% spread across nine different books suggests bookmakers themselves aren't entirely aligned on where this one should settle. This is the kind of fixture where consensus is thin.
By contrast, the Athletics-Mariners game is painted as considerably more one-sided, with Seattle commanding a 60.6% implied win probability compared to Oakland's 39.4%. Despite that 21-point gap in the market's assessment, the book spread is identical at 10.7%, indicating that while bookmakers agree the Mariners are favorites, they disagree meaningfully on the size of that advantage. The 5.5% margin between implied probability and the broader book consensus sits just above the Arizona-Texas pair, suggesting similar levels of uncertainty despite the wider gap in the matchup itself.
Prices captured 2026-09-12 00:00 UTC. Odds move.