Seattle Mariners Trade Struggling Pitcher to Orioles After Recent DFA

Castillo, 30, does not have much experience in the Major Leagues. He has pitched in only five games at that level in his career, three in relief for the Detroit Tigers in 2022, and two starts this year for Seattle.

In those outings, the pitcher has tallied 10.2 innings while pitching to a 5.06 ERA with nine strikeouts. He served as a depth piece for the Mariners while they have been dealing with injuries to other starters like Logan Gilbert and George Kirby.

His outings with Seattle were not great this year, as most of the earned runs he has allowed in his MLB career came from those two starts. He carries a 7.71 ERA across seven innings to Baltimore with five strikeouts and a 2.71 WHIP.

It is an interesting trade, as now the Mariners may have more cash available to make some moves at the 2025 MLB trade deadline. For the Orioles, they now have more pitching depth. 

It was highly unlikely that Seattle would need Castillo to fill in again this season, and this move gives him the opportunity to pitch more regularly and have a better chance of sticking in the Majors.