The improved Houston Astros have thrown a baseball betting odds wrench into the Mariners’ hopes. Meanwhile, in 2024, it was more of the same for the Seattle Mariners. Seattle teased fans and gamblers with a playoff berth in the mediocre American League West. But Seattle failed to close the deal, a trend that seems likely to continue in 2025. Few teams are better at perpetually disappointing their fans than the Seattle Mariners. Seattle is a tough sell to the casual sector due to its mediocre history. Additionally, a lackluster offseason has not inspired confidence or much betting action.
2025 Seattle Mariners
| 2025 World Series Championship Odds: | +3000 |
|---|---|
| 2025 American League Pennant Odds: | +1300 |
| 2025 American League West Division Championship Odds: | +550 |
| MLB Payroll Ranking: | 13th |
2025 Seattle Mariners Upcoming Games
Following the Offshore betting All-Star break, Seattle will host the Houston Astros from July 18-20.
2025 Seattle Mariners Manager and Key Players
Manager Dan Wilson took over at the end of last season and went 21-13. Previously, he was a member of the Mariners. Also, he is a member of the team’s Hall of Fame.
In 2023, CF Julio Rodriguez produced 102 runs, 37 doubles, 32 home runs, 103 runs batted in, a .485 slugging percentage, and a .818 OPS. He is a two-time All-Star and two-time Silver Slugger Award winner. Last year, he hit .273 with 20 home runs and 68 RBI. He hit .273 with a .734 OPS. Thus far in 2025, Rodriguez has 51 runs, 12 doubles, 11 home runs, 42 runs batted in, a .259 batting average, and a .726 OPS.
Additionally, Catcher Cal Raleigh is a 2025 AL MVP candidate with 59 runs, 16 doubles, 32 home runs, 69 runs batted in, a .275 average, and a 1.031 OPS.
RHP Luis Castillo is the #1 starter for Seattle. Last year, Castillo was 11-12 with a 3.64 earned run average with a 1.17 WHIP. In 2023, he was 14-9 with a 3.34 ERA and 1.10 WHIP. Correlate that Castillo is a three-time All-Star. So far in 2025, Castillo is 4-5 with a 3.55 earned run average and a 1.29 WHIP.
RHP Andres Munoz is the Seattle closer. In 2023, Munoz was 4-7 with a 2.94 ERA and 1.27 WHIP with 13 saves in 16 opportunities. In 2024, he posted a 3-7 record with a 2.12 ERA and a 0.96 WHIP. Munoz saved 22 games. So far in 2025, Munoz is 3-1 with a 1.16 earned run average and 0.90 WHIP. In turn, he has 18 saves in 23 chances.
2025 Seattle Mariners Team Overview
In sum, Seattle ranks 12th for run production, 10th for OPS, 7th for home runs, and 4th for stolen bases. On the mound, Seattle is 17th for earned run average, 17th for WHIP, 13th for quality starts, and 10th for bullpen earned run average. Seattle is a good fielding team, ranking 4th for fewest errors committed.
Overall, the Seattle Mariners are 43-40 and 46-33-4 over the MLB odds total. The Mariners are 6.5 games behind the Houston Astros as the second-place team in the American League West. Seattle is 20-19 at home and 23-21 on the road. Seattle is -35 units with the moneyline and is -907 on the run line. Seattle is -281 units at home and +246 on the road.
In 2025, the Seattle Mariners flirted with a potential playoff run, but after a promising start, they fell further behind the Houston Astros. Houston is the traditional power of the American League West and is resurgent after a disappointing 2024 campaign.