Mariners Primary LogoMariners Alternate LogoMariners Wordmark LogoMariners Team MerchEstablished 1977 City Seattle League History 2000 – Present / Major League Baseball 1977 – 1999 / American League Team History 1977 – Present / Seattle Mariners Nickname Mariners – As a lifelong Seattle Mariners fan, you may have heard the team’s nickname and wondered where it came from. The name’s origins …