The Seattle Mariners History began in 1977 as an expansion team in the American League. Since then, the club has grown into a key part of Seattle Mariners Baseball, developing iconic players, memorable seasons, and a passionate fan base at T-Mobile Park. Their journey reflects perseverance, talent, and dedication to success. Mariners Primary LogoMariners Alternate LogoMariners Wordmark LogoMariners Team MerchEstablished …