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The Mariners odds to win the World Series are off the board.
The Mariners AL pennant odds are off the board.
The Mariners AL West champion odds are off the board
The Mariners odds to make the playoffs are off the board. Their odds to miss the playoffs are off the board.
Find out where the Seattle Mariners rank in MLB payroll and the highest-paid players on their team this 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
Find out which MLB teams and players were the most popular at BetMGM during the 2025 season. Read More
Where do the Seattle Mariners sit in the current MLB postseason bracket? Updated playoff odds and projected seed for the Mariners. Read More
Find out which teams added the best players at the 2025 MLB Trade Deadline. Read More
Watch a Bet Sweats breakdown of Cal Raleigh’s MVP chances. Read More
Find out which Mariners players are scheduled to hit free agency and be eligible for arbitration after the 2025 MLB season. Read More
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Season betting previews and predictions for the Angels, Astros, Athletics, Mariners, and Rangers ahead of the 2025 MLB campaign. 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:Â
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.Â
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?Â
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?Â
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.Â
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.
