Seattle Mariners 2025 Season Preview

The Mariners look to make the playoffs for the first time since 2022. It was a long drought before that as Seattle had not been in the playoffs since 2001. The team has finished second or third in the AL West every year since 2020. The 85 games won last season were the least in a full baseball season since 2019. The challenge for those making MLB picks and MLB playoff predictions is whether Seattle has enough to make the postseason or whether it will continue to chase the Astros and occasionally the Rangers in the division.

2025 Seattle Mariners Win Total Projection & World Series Odds

The Mariners are +3000 to win the World Series. They are not one of the MLB teams that figure in the mix to take home the glamorous trophy come the postseason. In MLB news when it comes to win total projection, they sit at 85½. They have won 90, 90, 88 and 85 games across the last four seasons. In MLB news, this number when it comes to win total projection is a tough one to figure. Seattle wins a lot of games but it also has regressed in the last three seasons. Let the bettors beware.

2025 Seattle Mariners Projected Starting Lineup

• Victor Robles, RF
• Julio Rodríguez, CF
• Cal Raleigh, C
• Randy Arozarena, LF
• Luke Raley, 1B
• Jorge Polanco, 3B
• Rowdy Tellez, DH
• Ryan Bliss, 2B

Lineup Strengths and Weaknesses

This is probably one of the most stunning stats from any season of MLB. The Mariners had nine players strike out more than 100 times last year. As a team, it struck out 1,625 times in 5,330 at-bats. Almost hard to believe Seattle won 85 games. You can throw in the stat it hit .224 as a team and one can see problems.

Rodriguez hit .273. He was the lone Mariner in the lineup to average better than .231. That is unacceptable if you have any hopes of making the playoffs, let alone the World Series.

Raleigh had 34 home runs and 100 RBI but struck out 176 times. Bettors probably had a field day with same-game MLB baseball parlay picks for opposing pitchers and striking out Mariners.

The addition of Arozarena at the trade deadline will pay dividends in the long run. He’s an exciting player and can deliver clutch hits. He’s also got plenty of experience and nothing will faze him.

Raley hit 22 home runs in a utility role and should add more this year as the first baseman. MLB injuries saw Polanco have knee surgery in the offseason. Once he rounds to form his veteran bat and influence can only help.

A good spring training has Bliss in a better spot to play second base than Dylan Moore, who could go to a utility role.

Seattle Mariners Projected Starting Rotation

Per MLB. com:

1. Luis Castillo, RHP
2. Logan Gilbert, RHP
3. Bryce Miller, RHP
4. Bryan Woo, RHP
5. Emerson Hancock, RHP

Miller, Castillo, and Gilbert made 94 starts between them in 2024. Woo and Hancock combined for another 34. That’s a solid nucleus for the starting rotation. Gilbert led all AL pitchers with 208.2 innings. Castillo should be far better than his 11-12 mark if the team can get him run support. When it comes to starting pitching, many MLB matchups will favor Seattle.

George Kirby is battling shoulder inflammation but should return to the rotation at some point.

Projected Bullpen

RHP Andrés Muñoz, RHP Gregory Santos, RHP Collin Snider, RHP Trent Thornton, RHP Eduard Bazardo, LHP Tayler Saucedo, LHP Gabe Speier, RHP Seth Martinez

Munoz can strike out batters with the best of them. He had 77 Ks in less than 60 innings last year. He also had 22 saves. Thornton had 77 strikeouts in 72.1 innings. The bullpen has some strong arms that can get the job done and hopefully get the ball to Munoz with a lead.

Seattle Mariners Schedule and Key Matchups

MLB teams will certainly notice how the early schedule favors the Mariners, who will play 13 of their first 16 games at home. The series is against the Athletics, Tigers, Astros and Rangers. Three of the four look like teams that will be among MLB picks to contend for the postseason.

The Blue Jays and Yankees come in for a series in May before the Mariners hit the road to play the Padres, White Sox, and Astros. The series against Chicago will be key to making sure this isn’t a rough road trip.

July opens with home series against Kansas City and Pittsburgh before a road trip against the Yankees and Tigers that leads into the All-Star break. There should be a great picture of Seattle’s hopes by the time teams get some days off for the ASG.

August features a 10-game homestand to open the month and a six-game later when the Athletics and Padres visit.

The good news is the season ends with a six-game homestand. The bad news is the last three games are against the world-champion Dodgers. Seattle can only hope LA has its playoff position wrapped up and rests its regulars then.