This one is exceptionally difficult. While we're usually given the year to help us out with a time frame, Matt at Sporcle has been exceptionally cruel with today's quiz, in asking how many Mariners have struck out 10 or more batters in a game. The first batch seems pretty cut and dry until you see that the entire second column is people who have only done it twice.
There's one pitcher in here who hasn't been in any of these quizzes and probably won't be in another one unless it's about one and done obscure Mariners.
Post your answers in the comments but beware of spoilers.