Mariners prepare to celebrate 50th season anniversary in style

The 2026 season is going to be an extremely special one for the Seattle Mariners organization, both on and off the field.

There is already plenty of anticipation for the Mariners in 2026, with it set up to be one of the most important campaigns in franchise history. This past season saw the team closer than ever to a first AL Pennant and World Series berth, and they’ve already taken the first big step in contending once again after signing Josh Naylor to a five-year, $92.5 million deal.

However, 2026 will also represent a special season for the Mariners as the 50th year of Major League Baseball in Seattle. In some respects it’s hard to believe it has already been that long since the team played their first regular season game on April 6 in 1977 versus the then-California Angels, but here we are.

To commemorate 50 years of Mariners baseball the team will wear a “50 Seasons” patch on their jerseys during the 2026 season, which will replace the primary logo on the sleeves. The logo will pay homage to the history of the team, including a ring of 116 lines for the 2001 team’s AL-record 116 wins, the original typeface from the team’s inaugural 1977 season and more.

50 greatest Mariners players of all time

Fans can get involved in helping name the Top 50 Greatest Mariners Players in franchise history, by voting now at Mariners.com/50 through February 20, 2026. The players will be revealed and honored in a special pregame ceremony on August 8 at T-Mobile Park.

As you would expect, the Mariners are extremely excited about celebrating 50 years of baseball in the Pacific Northwest with their loyal and passionate fanbase. In a released statement, President of Business Operations Kevin Martinez said:

“Celebrating 50 seasons of Mariners baseball is a tribute to the generations of fans, the community, and the Mariners players who have defined this franchise. Their passion, dedication, and belief have carried this franchise for the past half-century, and their passion fuels our excitement for not only our 50 Seasons celebration, but also the next 50 years of Mariners baseball.”

50 years of special moments for the Mariners and their fans

Certainly there have been plenty of special moments since 1977 in Seattle, including Ken Griffey Jr. (1997) and Ichiro Suzuki (2001) both being named AL MVP, as well as Cal Raliegh’s 60-home runs this past season. In addition there’s Randy Johnson (1995) and Félix Hernández (2010) both winning the AL Cy Young, with the latter also pitching the only perfect game in franchise history on Aug. 15, 2012.

These are just a few of the highlights in 50 years of Mariners baseball, with a variety of celebration weekend events either already announced or set to be unveiled at a later date. This includes a 50 Seasons Celebration Weekend during the home series against the Tampa Bay Rays between Aug 7-9, which will culminate with a 50 Seasons Celebration Night on Aug. 8.

On Wednesday, the team debuted their Mariners 50 Seasons Collection at both T-Mobile Park and its Downtown Seattle Store (4th & Stewart). The collection includes Mariners 50 Seasons caps, apparel, and baseballs, with more gear arriving throughout the holidays and during 2026.

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Plenty of promotions and giveaways for M’s fans

The Mariners have also announced a whole host of 50 seasons promotions and giveaways to take place throughout the 2026 season. The confirmed dates are as follows:

• 4/17 — Kingdome Fanny Pack Hat Night presented by Global Credit Union, First 10,000 fans
• 4/18 — Cal Raleigh ’70s Jersey Night presented by Virginia Mason Franciscan Health, First 15,000 fans
• 4/19 — Mariners ’70s Pin Day presented by KeyBank, First 10,000 fans
• 5/1 — Randy Johnson ’80s Jersey Night presented by T-Mobile, First 20,000 fans
• 5/3 — Mariners ’80s Pin Day presented by KeyBank, First 10,000 fans
• 5/30 — Julio Rodríguez ’90s Jersey Night presented by KeyBank, First 15,000 fans
• 5/31 — Mariners ’90s Pin Day presented by KeyBank, First 10,000 fans
• 7/19 — Mariners ’00s Pin Day presented by KeyBank, First 10,000 fans
• 8/8 — Mariners 50 Seasons Celebration Night
• 8/9 — Mariners 50 Seasons Pin Day presented by KeyBank, First 10,000 fans
• 8/23 — Mariners ’10s Pin Day presented by KeyBank, First 10,000 fans
• 9/26 — Mariners ’20s Pin Night presented by KeyBank, First 10,000 fans

Finally, there will be a 50 Seasons Summer Soiree charity gala at Victory Hall on Aug. 2, with a portion of the funds raised in support of the Mariners Care Foundation going towards a 50 Seasons legacy gift which will benefit the Seattle community. Tickets to the gala will go on sale at a later date, with more details to follow.

Photos court​‌esy of Tim Rogers Photography & Mariners media

Of the events already announced to celebrate 50 seasons of Mariners baseball, which one are you most looking forward to? Further, what is your number one memory of the team from the past five decades? Let us know your thoughts in the comments section below.