When people think about roster changes, additions usually take center stage. Everyone wants to know what new faces will have a positive impact on their favorite team but with finite spots available, each addition will require a corresponding subtraction. The Mariners haven't had the results they were hoping for at the beginning of the season and around the trade deadline so further modifications are inevitable. Additionally, some players might also leave of their own volition to pursue brighter pastures in free agency or even retirement.