Opening Day is Thursday, March 26. The Mariners host the Cleveland Guardians at T-Mobile Park, and it’s not just another home opener — 2026 marks the franchise’s 50th anniversary season. There’s extra weight to this one.

Whether you’re going to the park, watching from home, or shopping for gear to mark the occasion, here’s everything you need.

The Game

Who: Seattle Mariners vs. Cleveland Guardians When: Thursday, March 26, 2026 Where: T-Mobile Park, Seattle

The Mariners open as AL West champs defending their division — and the 50 Seasons patch on their jerseys makes it official that this year means something.

Going to the Game

Opening Day sells out or gets close. If you haven’t locked in tickets yet, SeatGeek is the best place to find remaining inventory at realistic prices.

A few tips:

  • Get there early. The team is handing out magnetic schedules (presented by Starbucks) to fans on Opening Day. Gates open well before first pitch — don’t show up at game time.
  • Best seats for the money: Lower level along the first or third base lines (sections 120–135 and 145–160). You’re close to the action without paying premium behind home plate.
  • March weather in Seattle: It’s going to be cold and possibly wet. Layer up.

👉 Find Mariners Opening Day Tickets — SeatGeek

What to Wear

Opening Day is the one game where you really don’t want to show up in a generic tee. The 50th anniversary season deserves a proper jersey.

The two obvious choices for 2026:

Julio Rodríguez #44 — The face of the franchise, the guy you’re betting the next decade on. If you don’t have a J-Rod jersey yet, Opening Day is the occasion to fix that.

👉 Julio Rodríguez Jersey — Fanatics

Cal Raleigh #29 — Big Dumper hit 60 home runs last season. He’s getting a bobblehead for it on March 28 (two days after Opening Day). Wearing his jersey this week feels appropriate.

👉 Cal Raleigh Jersey — Fanatics

Want something that honors the 50-year history? The Griffey cooperstown throwback never goes out of style.

👉 Ken Griffey Jr. Throwback Jersey — Fanatics

👉 Shop All Mariners Jerseys — Fanatics

Watching From Home

Can’t make it to the park? The Mariners’ in-market streaming service, Mariners.TV, is the way to watch every game this season — no cable required. It replaced ROOT Sports for 2026.

  • Price: $99.99 for the full season
  • Works on: Roku, Apple TV, Fire TV, iOS, Android, web browser
  • Blackout rules: In-market only — if you’re in the Seattle viewing area, this is your option

We did a full breakdown here: Mariners.TV Review 2026 →

The 50th Anniversary Season: Games Worth Marking on Your Calendar

While you’re planning Opening Day, a few other dates worth knowing:

Date Event
Mar 27 AL West Champs Replica Banner Night
Mar 28 Cal Raleigh “60 HR” Bobblehead Night
Apr 10 Ichiro Replica Statue Night
May 2 Randy Johnson #51 Retirement Ceremony
Aug 8 50 Seasons Celebration Night — Top 50 Greatest Mariners ceremony
Aug 1 Aloha Shirt Night
Sep 5 Bryan Woo Bobblehead Night

The bobblehead and giveaway nights sell out fast. If you want to go to the Cal Raleigh bobblehead game on March 28 — that’s this Saturday — grab tickets today.

👉 Find Mariners Tickets — SeatGeek

Go M’s. ⚾