Mariners Promote Kade Anderson for MLB Debut, DFA Jhonathan Diaz After 1 1/3 Innings
Updated
Updated · MLB Trade Rumors · Aug 22
Mariners Promote Kade Anderson for MLB Debut, DFA Jhonathan Diaz After 1 1/3 Innings
3 articles · Updated · MLB Trade Rumors · Aug 22
Summary
Seattle selected Kade Anderson’s contract and designated Jhonathan Diaz for assignment to open both a 26-man and 40-man roster spot.
Anderson is set to make his MLB debut Friday against the Cubs after Bryan Woo’s sore shoulder pushed back his start; the Mariners also plan a six-man rotation, with Bryce Miller managing a tired arm.
Diaz’s latest stint lasted 3 days and 1 appearance — he allowed 1 earned run in 1 1/3 relief innings Thursday after spending most of 2026 at Triple-A Tacoma.
At Tacoma, Diaz posted a 6.22 ERA over 111 1/3 innings and gave up 20 homers, continuing a two-year rise in home-run trouble that has undercut his swingman value.
This is Seattle’s third DFA of Diaz since February 2024, and if he clears waivers he can elect free agency instead of accepting an outright assignment.