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Mariners Designate José Castillo For Assignment

By Darragh McDonald | September 12, 2025 at 5:55pm CDT

The Mariners announced today that they have recalled right-hander Casey Legumina from Triple-A Tacoma. In a corresponding move, left-hander José Castillo has been designated for assignment. The club’s 40-man roster count drops to 39.

Castillo, 29, was just claimed off waivers from the Mets earlier this month. Since that claim, he has given the Mariners three scoreless innings. This move is likely more a result of circumstances than his performance. The Mariners are seven games into a stretch of ten in a row. The bullpen has been leaned on heavily in recent days. Five different relievers pitched on Tuesday. Then on Wednesday, six relievers were used in a game which went to 13 innings. Three of those six pitchers tossed more than an inning. Last night, the club had another long one, using six relievers in a 12-inning game.

Every reliever in the bullpen pitched at least twice in that three-day span except for Emerson Hancock, who logged two innings on Wednesday. Castillo himself pitched in each of the last two games and has seemingly been nudged out to get a fresh arm into the bullpen.

It’s been that kind of year for Castillo, who has generally pitched well. But since he’s out of options, he has been forced into DFA limbo numerous times. He started the year with the Diamondbacks on a minor league deal. He was added to the big league roster at the start of May. Less than two weeks later, he was designated for assignment and traded to the Mets. The latter club designated him for assignment three times. The first two resulted in him clearing waivers and later getting added back to the roster, but the M’s claimed him on the third.

He’s now back in DFA limbo yet again. Since the trade deadline has passed, he’ll be back on waivers in the coming days. Around all the transactions, he has tossed 24 2/3 innings with a 4.38 earned run average, 19.5% strikeout rate, 9.3% walk rate and 55.7% ground ball rate. He has also thrown 16 Triple-A innings this year with a 1.69 ERA, 35.9% strikeout rate, 9.4% walk rate and 50% grounder rate.

At this time of year, he wouldn’t be postseason eligible with any claiming club, though perhaps some team is in need of a fresh arm for the stretch run. As mentioned, Castillo just appeared in the past two games but will have a chance to rest for a few days while on waivers. He could also be retained for next year via arbitration if he’s on a roster somewhere at the end of the season.

Photo courtesy of Vincent Carchietta, Imagn Images

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Seattle Mariners Transactions Casey Legumina Jose Castillo

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View Comments (8)
Post a Comment

8 Comments

  1. Butters

    1 month ago

    Send down the lefty call up the righty.

    Reply
    • myaccount2

      1 month ago

      The M’s already have two lefties in their pen with Speier and Ferguson, so not an unusual decision on their part.

      Reply
    • Butters

      1 month ago

      Ahh..I see. So was I 50/50 on that comment?

      Reply
  2. sad tormented neglected mariners fan

    1 month ago

    Oh my god I thought I would never have to see legumina lose us another game

    4
    Reply
  3. Charlie III

    1 month ago

    The new Jesse Chavez!

    Reply
  4. SodoMojo90

    1 month ago

    Oh geez. How many times does Legumina allow a close game to get out of reach this time around?

    Reply
    • sad tormented neglected mariners fan

      1 month ago

      Jerry loves him because he can strike out a batter per inning and doesn’t care that he’s going to give up 2 runs per inning

      Reply
  5. angt222

    1 month ago

    Mets should claim him again.

    1
    Reply

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