Seattle Mariners probable pitchers & starting lineups vs. Athletics, March 28

The Seattle Mariners wasted no time making their presence felt on Opening Day. With Logan Gilbert taking the mound for his first Opening Day start, there was a real possibility he would end up a tough-luck loser despite delivering a masterclass performance on the mound. Gilbert allowed just one run on two hits over seven innings while racking up eight strikeouts.

But the Mariners’ bats came through when it mattered most. Thunderous home runs from Randy Arozarena and a now-healthy Jorge Polanco sealed a thrilling 4-2 victory over the A’s.

One game down, 161 to go. With momentum on their side, the Mariners look to keep rolling in Game 2 of their four-game set against Oakland. Here’s a look at how the lineups might shake out for tonight’s matchup, with first pitch at T-Mobile Park set for 6:40 p.m. PT.

Probable starting pitchers

For Mariners: Luis Castillo, RHP (0-0)

Castillo will take the mound for his first start of the 2025 season. Coming off a solid yet slightly uncharacteristic 2024 campaign, Castillo posted a 3.64 ERA with 175 strikeouts across 175.1 innings, finishing with an 11-12 record. While last season didn’t quite match the elite standard he's set in previous years, he remained a dependable arm atop Seattle’s pitching staff. Now, with a fresh slate, Castillo looks to reestablish himself as one of the American League’s premier arms, starting with a strong outing against Oakland.

For Athletics: Jeffrey Springs, LHP (0-0)

Springs is set to make his first start as a member of the A’s, marking his return to a full-time starting role for the first time since 2022 with the Tampa Bay Rays. After missing the second half of the 2023 season and the beginning of 2024 recovering from Tommy John, Springs is eager to prove he can be a key contributor in the Athletics' rotation. He’ll face a Mariners lineup that historically feasted on left-handed pitching but struggled against southpaws throughout the 2024 season. If Springs can exploit those weaknesses, he could make an immediate statement in his new uniform. However, if Seattle’s hitters find their rhythm, it will be a challenging debut for the lefty.

Mariners Starting Lineup, March 28

1. RF Victor Robles (R)
2. CF Julio Rodriguez (R)
3. DH Cal Raleigh (S)
4. LF Randy Arozarena (R)
5. C Mitch Garver (R)
6. 3B Jorge Polanco (S)
7. 1B Donovan Solano (R)
8. 2B Dylan Moore (R)
9. SS J.P Crawford (L)

Athletics Starting Lineup, March 28

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

How can I watch the Mariners tonight?

Regional coverage:

• Washington, Oregon, Idaho, Montana, Alaska: The game will be televised on ROOT Sports Northwest.​
• Northern California: Viewers can watch on NBC Sports California.​

Satellite coverage:

• Nationwide: Available via DirectTV

Streaming Options

• ROOT Sports Streaming App: Fans in Washington, Oregon, Idaho, Montana, and Alaska can stream the game live through the ROOT Sports streaming service
• FuboTV: Subscribers in the aforementioned regions can also stream the game live via FuboTV, which carries ROOT Sports Northwest.
• MLB.TV: Out-of-market viewers can watch the game live with an MLB.TV (subscription required)

Radio Broadcast:

• Seattle Region: Tune in to Seattle Sports 710 AM or stream the audio live at seattlesports.com.​
• Oakland Region: Fans can listen to the game via A’s Cast on athletics.com/ascast.​

Please verify local listings and streaming service availability to ensure access to the game in your area.

What's at stake?

Though it’s still early in the season, this matchup carries weight beyond just another game in a 162-game marathon. The Mariners have the opportunity to jump ahead with a 2-0 series lead over the A’s in this four-game set, setting the tone in their first divisional battle of the year.

The Mariners will also don their City Connect uniforms tonight. Currently holding a 15-1 record when wearing these outfits, they look to continue building on this impressive record in 2025.

While it may not feel like a must-win scenario just yet, these early-season victories can build momentum and establish a foothold in the AL West standings. For Seattle, taking control early means proving they’re serious contenders for the division crown. For Oakland, it’s about showing they can punch above expectations and not be taken lightly.

Bragging rights aside, the winner of this series gets a crucial head start in what’s sure to be a competitive division race.