That would be Denard Span, who was under team control for the 2019 season via a $12 million club option. Seattle has opted against picking up said option, buying out Span’s contract for $4 million and allowing him to pursue an opportunity elsewhere in free agency.
This now opens up a hole in left field on the Mariners’ roster. We’ve made the case for Ben Gamel to become the full-time starter out there, but it’s possible Seattle doesn’t see it that way and will look to target one of the MLB’s impending free agent left fielders over the next month or two.