The Seattle Mariners visit the Oakland Athletics on Sunday, September 13, 2026. Seattle holds a 70-79 record, while Oakland is at 60-89, showing a clear edge in overall performance for the Mariners. This difference is reflected in the moneyline odds: Seattle is favored at -149, meaning you’d need to bet $149 to win $100. Oakland is the underdog at +123, so a $100 bet would net $123 if they pull off the upset.
The spread is set at 1.5 runs. Seattle is the favorite with -1.5 at +109, indicating a slightly higher payout if you take the Mariners to win by two or more runs. Meanwhile, Oakland’s +1.5 is priced at -131, meaning you must bet $131 to win $100 on the Athletics either winning outright or losing by just one run.
The total runs line is 10.0, with the over at -105 and the under at -114. This suggests the sportsbook expects a moderately high-scoring game, but bettors will pay a bit more to take the under, indicating some caution about both teams combining for double-digit runs.
Overall, the Mariners look like the safer bet, given their better record and favored status. However, the slim spread and pricing suggest Oakland could keep it close. If you prefer less risk, taking the moneyline on Seattle is straightforward. For a bit more excitement, the spread or total runs line offer interesting options depending on how you view the pitching and offense matchup.