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The Mariners odds to win the World Series are +3000.
World Series Favorites
The Mariners AL pennant odds are +1300.
AL Pennant Favorites
The Mariners AL West champion odds are +260
AL West Odds
The Mariners odds to make the playoffs are -120. Their odds to miss the playoffs are +100.
The Detroit Tigers (+100) visit T-Mobile Park to take on the Seattle Mariners (-120) on Monday, March 31, 2025. First pitch is scheduled for 9:40pm EDT in Seattle, WA. This season, the Tigers are 0-3 Read More
The Oakland Athletics (+140) visit T-Mobile Park to take on the Seattle Mariners (-170) on Sunday, March 30, 2025. First pitch is scheduled for 4:10pm EDT in Seattle, WA. This season, the Athletics ar Read More
The Oakland Athletics (+135) visit T-Mobile Park to take on the Seattle Mariners (-160) on Saturday, March 29, 2025. First pitch is scheduled for 9:40pm EDT in Seattle, WA. This season, the Athletics Read More
Find out which MLB teams had the youngest and oldest Opening Day roster for the 2025 season. Read More
Best MLB teams for 2025. See power rankings for the top MLB teams this season, including the Dodgers, Yankees, Braves, Orioles, and Mets. Read More
Season betting previews and predictions for the Angels, Astros, Athletics, Mariners, and Rangers ahead of the 2025 MLB campaign. Read More
Check out updated MLB odds, projected depth chart, and betting predictions for the Seattle Mariners ahead of the 2025 season. Read More
Which MLB team has won the most World Series titles, and who are the five that have never won it all? Find out here. Read More
Updated weather forecast for Nationals Park on Friday, May 24. Read More
Run lines, over/under totals, moneylines, and more odds are available for each Mariners game this season.
If you’re in Washington and interested in odds for other teams, check out:
Will the Mariners win the AL West? Will they win the AL pennant? How many home runs will a certain player hit this season?
For example: If you bet $40 on the Mariners (+600) to make the postseason, the bet would settle when Seattle is eliminated or when they clinch a postseason berth.
The run line is baseball’s version of the spread. What’s the final scoring margin of the game?
For example: If you bet $80 on the Mariners -1.5 (+210) against the Oakland Athletics, Seattle must win the game by at least two runs.
Alternatively, if you bet $80 on the Mariners +1.5 (-120) against the New York Yankees, Seattle must lose by one run (or win the game).
Will the Mariners win the game?
For example: If you bet $75 on the Mariners -300 against the Pittsburgh Pirates, Seattle must win the game (in nine innings or extra innings).
How many combined runs will be scored by both teams in the matchup?
For example: If you bet $30 on over 7.5 (-110) in their game against the Kansas City Royals , the teams must combine for at least eight runs.
Alternatively, if you bet $40 on under 7.5 (-110), the teams must combine for seven or fewer runs.
If the combined run total is the same as the over/under total, the bet is a push.
You can combine bets and other bets — baseball or another sport — into one parlay.
For example: If you bet $20 on a two-leg parlay with the Mariners moneyline (-180) vs. the San Francisco Giants and over 7.5 (-110) in the Baltimore Orioles-Tampa Bay Rays game, both must hit for the bet to cash.
If one bet is a push, it’s eliminated from the parlay, and odds (and payout) are recalculated without that leg.
