The first season of the Seattle Mariners was 1977.
Bill Hall's First Home Run On The Mariners
In 1993, Alex Rodriguez was drafted first overall by the Seattle Mariners. He played his first game for the Mariners on July 8, 1994.
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Justin Smoak is a first baseman for the Seattle Mariners.
Logan Morrison is a first baseman for the Seattle Mariners.
Roger Clemens on May 23 against the Seattle Mariners.
Ken Griffey Jr. with the first overall pick.
Ken Griffey Jr. with the first overall selection.
Ken Griffey Jr. was drafted in the first round of picks in 1987.
Ji-Man Choi is a first baseman for the Seattle Mariners.
Since the Seattle Mariners began operating in 1977 they have 114 outfielders listed on their all-time roster. How many played left field at one time or another would take a lot of research going through each daily box score of every game. It is safe to assume that many of the 114 played left field occasionally. Of course, the Mariners were not the first major league team in Seattle..an expansion team, the Seattle Pilots started MLB in Seattle and moved to Milwaukee in 1970 and became the Milwaukee Brewers.