Grading the Seattle Mariners Trade Deadline

With the 2026 MLB trade deadline having come and gone, the Mariners find themselves in the midst of a heated playoff race in need of a major roster shakeup. Always active on the trade front, Jerry Dipoto, Justin Hollander, and the rest of the Seattle front office spun a pair of deals to improve their playoff odds over the past 48 hours and have created a new-look roster that will be tasked with getting this organization across the finish line. Let's break down the moves!

Mariners acquire RHP Seranthony Dominguez, OF Nolan Jones, C/LF Boston Smith, and cash considerations from the Chicago White Sox in exchange RHP Luis Castillo