Mariners Opening Day 2025: Full preview with hype video, lineups, matchups, more

It was a long offseason in the Pacific Northwest, but Opening Day for the Seattle Mariners' 2025 season is here. Before you get your trident out to celebrate accordingly, you're going to want to fill your brain with everything you need to know about the opener.

The Mariners are taking on the Athletics at T-Mobile Park, with first pitch scheduled for 7:10 p.m. ET. Click here for how you can watch, and here for who will be calling the game.

These are just the basics. As for what else is worth knowing, let's settle in for a deeper dive.

Is there a hype video?

You bet there's a hype video, and here it is courtesy of the Mariners' X (formerly Twitter) account:

Mind you, every team puts out a hype video on Opening Day. Heck, the Chicago White Sox have one. So do the Miami Marlins. And so on.

Yet few teams truly deserve to have an Opening Day hype video, and the Mariners are one of them. They do have a passionate fanbase. And they do have big hopes for 2025, up to and including for a trip to the franchise's first ever World Series.

What are the lineups for the Mariners and A's?

As the team announced on X (formerly Twitter), the Mariners will be lining up like this:

1. RF Victor Robles (R)
2. CFJulio Rodríguez (R)
3. C Cal Raleigh (S)
4. LF Randy Arozarena (R)
5. 1B Luke Raley (L)
6. 3B Jorge Polanco (S)
7. DH Rowdy Tellez (L)
8. 2B Ryan Bliss (R)
9. SS J.P. Crawford (L)

The Mariners are coming into 2025 off a finish to the 2024 season in which they led the AL in scoring after Dan Wilson took over as manager in August. The offense was also prolific during spring training, ranking second in MLB with 199 runs scored.

The front six of this lineup is solid. Robles hit .328 and stole 30 bases in 77 games as a Mariner in 2024. J-Rod and Raleigh both pack MVP upside. Arozarena is pretty much a shoo-in for a 20-20 season. Raley has 20-20 potential in his own right, and Polanco is looking to build on a second half of 2024 in which he collected 11 of his 16 total home runs.

The surprises in Seattle's projected Opening Day lineup are at the bottom. Tellez forced his way onto the roster (and Mitch Haniger off it) with a hot spring, while Bliss wrestled the starting second base gig away from Dylan Moore. Tellez's power combined with Bliss' speed and Crawford's hitting acumen could make the bottom of the Mariners' order more potent than most.

Meanwhile, here's how the A's are lining up:

1. RF Lawrence Butler (L)
2. DH Brent Rooker (R)
3. CF JJ Bleday (L)
4. C Shea Langeliers (R)
5. LF Miguel Andujar (R)
6. 1B Tyler Soderstrom (L)
7. 3B Gio Urshela (R)
8. 2B Max Muncy (R)
9. SS Jacob Wilson (R)

Butler and Rooker are a duo to beware on Thursday, and indeed for the rest of 2025. Both were strong in 2024, and especially in the second half as they combined for a .903 OPS and 31 home runs.

This is otherwise a beatable lineup, and particularly for the guy who will be on the hill for the Mariners.

Who are the starting pitchers?

It'll be Logan Gilbert for the Mariners and Luis Severino for the A's.

Gilbert is making his first Opening Day start, and nobody can say he doesn't deserve it. The 27-year-old was a first-time All-Star in 2024 and he ended up leading MLB with 208.2 innings and a 0.887 WHIP. He threw harder as last year went along and he's now one of several Mariners with a new pitch.

Severino resurrected his career in 2024, posting a 3.91 ERA over 182 innings for the New York Mets. He pitched a total of 209.1 innings between 2019 and 2023, however, so his club-record $67 million contract carries no small amount of risk for the A's.

Severino started on Opening Day for the New York Yankees in 2018. He went 5.2 innings and allowed one hit and no runs, with seven strikeouts.

Who are the closers?

Only two of the best in the game, with Andrés Muñoz hoping to close it out for the Mariners and Mason Miller hoping to do the same for the A's.

Muñoz has one of the best fastball-slider combinations in baseball, with his heater capable of climbing over 100 mph and his slider holding hitters to a .138 average in 2024. He's another Mariner with a new pitch, as he deployed a new "kick change" during spring training.

Miller is among a small handful of pitchers who can throw harder than Muñoz, as his fastball topped out at 104 mph in 2024. He's a dangerous opponent that Mariners hitters would rather not see on Opening Day.

The primary setup men for Muñoz figure to be Gregory Santos, Collin Snider and Trent Thornton. The bridge to Miller consists mainly of José Leclerc, Tyler Ferguson and T.J. McFarland.

What's at stake?

A 1-0 start to the season, obviously.

The Mariners are otherwise trying to add to one of the better Opening Day track records of any major league team. They are 29-19 on Opening Day all-time, a .604 winning percentage that ranks behind only the Mets (.651).

As to other stakes, the Mariners' Opening Day strikeout and RBI records are hypothetically breakable and you just never know when a magic moment might happen.

Got any predictions?

Yes. And since there's no point in going small, here goes nothing:

• Gilbert pitches seven innings
• The Mariners get home runs from Rodríguez and Raleigh
• The home team wins, 6-2

Either way, the important thing is that the long wait is over. Opening Day is here and after today, there will only be 161 games left to go.