The Seattle Mariners are a Major League Baseball (MLB) franchise based in Seattle, Washington. They play in the American League West division. The first game of the new baseball season for a team is played on Opening Day, and being named the Opening Day starter is an honor, which is often given to the player who is expected to lead the pitching staff that season, though there are various strategic reasons why a team's best pitcher might not start on Opening Day. The Mariners have used 15 different Opening Day starting pitchers in their 34 seasons. The 15 starters have a combined Opening Day record of 11 wins, 11 losses (11–11) and 12 no decisions. No decisions are only awarded to the starting pitcher if the game is won or lost after the starting pitcher has left the game.