This is a list of the Seattle Mariners' games played in September 2014, along with the result of each game and the final score.
- September 1, 2014: Mariners vs. Texas Rangers - Mariners lose 3-6
- September 2, 2014: Mariners vs. Texas Rangers - Mariners win 6-5
- September 3, 2014: Mariners vs. Texas Rangers - Mariners lose 1-2
- September 4, 2014: Mariners vs. Houston Astros - Mariners win 4-3
- September 5, 2014: Mariners vs. Houston Astros - Mariners lose 2-5
- September 6, 2014: Mariners vs. Los Angeles Angels - Mariners win 4-3
- September 7, 2014: Mariners vs. Los Angeles Angels - Mariners lose 1-8
- September 8, 2014: Mariners vs. Los Angeles Angels - Mariners win 3-2
- September 9, 2014: Mariners vs. Toronto Blue Jays - Mariners lose 2-5
- September 10, 2014: Mariners vs. Toronto Blue Jays - Mariners win 4-1
- September 11, 2014: Mariners vs. Detroit Tigers - Mariners lose 3-7
- September 12, 2014: Mariners vs. Detroit Tigers - Mariners lose 2-6
- September 13, 2014: Mariners vs. Kansas City Royals - Mariners win 5-3
- September 14, 2014: Mariners vs. Kansas City Royals - Mariners win 7-3
- September 15, 2014: Mariners vs. Texas Rangers - Mariners lose 1-9
- September 16, 2014: Mariners vs. Texas Rangers - Mariners lose 1-13
- September 17, 2014: Mariners vs. Houston Astros - Mariners win 5-4
- September 18, 2014: Mariners vs. Houston Astros - Mariners win 6-5
- September 19, 2014: Mariners vs. Los Angeles Angels - Mariners lose 3-4
- September 20, 2014: Mariners vs. Los Angeles Angels - Mariners win 4-1
Note that this list only includes games where the Mariners played, and does not include games where they were the away team or any other non-MLB games. Updated: October 15, 2025 at 1:40 AM