The logo has a navy blue background surrounding the number 35, which is above a 1977-2012 banner that includes the Mariners' symbol and letter 'S.'
The patch will be worn on all Mariners home and road jerseys throughout the 2012 season, which will kick off in Tokyo in a two-game series against the A's on March 28-29.
The Mariners wore a similar uniform patch last year as a tribute to the late broadcaster Dave Niehaus. They've previously worn commemorative patches for the team's 30th anniversary in 2007, the All-Star Game in Safeco Field in 2001 and an MLB-wide tribute to the Negro Leagues in 1985.
The Mariners also announced they'll be returning the "Northwest Green"-billed caps as part of their home uniforms on Mondays and Fridays next season, to be worn along wtih the Northwest Green alternate jerseys that were brought back last year. A dark navy top will continue to be the alternate jersey for road games.
In one design change for 2012, the front of the navy jerseys will now read "Seattle" instead of "Mariners." The road grays already said "Seattle," and home jerseys will continue to say "Mariners."
Jerseys with the 35th anniversary patch as well as updated alternate road jerseys, the Northwest Green home jerseys and the green-billed caps are all now available at Mariners Team Stores.
The 35th anniversary celebration will include numerous special appearances and promotions throughout the year at Safeco Field, with details to be announced before the start of the season.