What happened: The Seattle Mariners are pursuing free agent outfielder Ian Happ to upgrade their defense, according to MLB Network's Jon Morosi. The reported interest follows preliminary discussions as Seattle opens its offseason outfield search.

Why it matters: Seattle has prioritized run prevention heading into the 2027 season after second baseman Cole Young captured an AL Gold Glove earlier this month. Adding Happ would secure a proven defender to stabilize left field alongside an emerging young core.

What to watch: Seattle will continue engaging free-agent outfielders as Hot Stove talks progress ahead of the Dec. 1 collective bargaining deadline.