The first season of the Seattle Mariners was 1977.
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Ken Griffey Jr's first team in Major League Baseball was the Seattle Mariners.
Just like all Major League teams, the Mariners have a 81 game home schedule.
The Seattle Mariners posted their best record in 2001. They finished the season with 116 wins and 46 losses. They set the American League record and also tied a Major League record for most wins during a 162-game season.
Pat Lennon debuted on September 15, 1991, playing for the Seattle Mariners at Kingdome; he played his final game on June 1, 1999, playing for the Toronto Blue Jays at Skydome.
The 1906 Chicago Cubs and the 2001 Seattle Mariners hold the MLB record for wins in the regular season with 116.