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Mariners Select Jhonathan Díaz

By Darragh McDonald | April 1, 2025 at 5:05pm CDT

The Mariners announced that they have selected the contract of left-hander Jhonathan Díaz. The club already had an open 40-man roster spot, so no corresponding move was necessary there. In terms of the active roster, right-hander Emerson Hancock has been optioned to Triple-A Tacoma. Daniel Kramer of MLB.com noted earlier that Díaz was in the clubhouse with Hancock headed out.

As of a month ago, the Mariners were set to open the season with a strong front five of Logan Gilbert, Bryce Miller, George Kirby, Bryan Woo and Luis Castillo. Unfortunately, Kirby was shut down in early March due to some shoulder inflammation and started the season on the injured list.

That opened an opportunity for Hancock but his start in yesterday’s game against the Tigers could hardly have gone much worse. He didn’t make it out of the first inning, recording just two outs, one of which was a caught stealing. He allowed six earned runs on seven hits, forcing the bullpen to cover 8 1/3 innings.

Of the club’s eight relievers, four of them pitched last night, each of them recording at least four outs and throwing at least 31 pitches. Out of the four guys who didn’t pitch last night, three of them appeared in Sunday’s contest.

They have brought up Díaz presumably for a multi-inning option out of the bullpen soon. Last year, he made five appearances in the majors for Seattle but spent most of his time in the Triple-A rotation. He logged 117 2/3 innings for Tacoma over 22 starts and one relief appearance. His 4.36 earned run average wasn’t bad in the context of the hitter-friendly Pacific Coast League. He struck out 22.9% of batters faced, gave out walks at a 9.9% clip and got grounders on 54.1% of balls in play.

The lefty was outrighted off the roster in February and elected free agency but returned via a minor league deal. He still has options, so the M’s could perhaps shuttle him to Tacoma and back throughout the year, recalling him whenever a situation like this arises.

In the short term, it’s unclear what the M’s plan to do with the rotation. They are in the midst of a seven-game stretch to start the season, with two more to go. But thanks to having five off-days in April and some at the start of May, they don’t play more than six games in a row again until the second half of May. Perhaps they could survive for a while with a four-man group of Gilbert, Miller, Woo and Castillo. Optionable arms like Hancock, Díaz and Blas Castano could perhaps make spot starts or take bulk work in occasional bullpen games over the next six weeks or so.

Photo courtesy of Steven Bisig, USA TODAY Sports

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Seattle Mariners Transactions Emerson Hancock Jhonathan Diaz

Sean Manaea To Be Shut Down Another Two Weeks Due To Setback In Rehab
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View Comments (23)
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23 Comments

  1. bloomquist4hof

    7 months ago

    They should have dug around for better starting pitcher depth? Ugh. I know it was only one blown start but I have to think any leash Hancock may have had is gone after a doozy like that.

    3
    Reply
    • bloomquist4hof

      7 months ago

      I think their best bet of a decent run from the current group of backups is Garcia but get they don’t want to put him on the 40 man yet, Diaz is more expendable.

      Reply
      • bloomquist4hof

        7 months ago

        And may view him more as a future bullpen arm anyway.

        Reply
    • slund24

      7 months ago

      they’re sending him down to bring up an extra arm after bullpen went 8.1 innings yesterday and with an upcoming day off they can skip his start and bring him back up when a 5th starter is needed.

      2
      Reply
      • slund24

        7 months ago

        or hopefully Kirby is ready soon.

        Reply
    • bseblfevr

      7 months ago

      From bad to worse. We are still averaging 10 SO per game.

      2
      Reply
      • sad tormented neglected mariners fan

        7 months ago

        ERA matters not K’s

        Spencer strider fanned a million guys but performed like a 3rd starter

        Reply
        • TheHighCheese4Me

          7 months ago

          I think he was referring to the lineup… It’s putrid.

          3
          Reply
    • BPax

      7 months ago

      Hancock had decent movement and velo, but everything ended up over the middle of the plate..

      Reply
    • rottenboyfriend

      7 months ago

      The weak offense that has been the Mariners downfall the past 2 years has already reared its ugly head in 2025! U can’t win consistently when U can’t score no matter how good your starting pitching is!

      1
      Reply
  2. Ignorant Son-of-a-b

    7 months ago

    He’s in a chatty mood.

    1
    Reply
  3. RedKing22

    7 months ago

    Seattle signed Luis Castillo to come back from Japan this offseason and he looked good in his first start in Tacoma.

    Do it Seattle, just do it

    Reply
    • deepseamonster32

      7 months ago

      We need him on the major league roster. The next phase of tricking the Red Sox into giving us Tristan Casas for Luis F Castillo

      Reply
    • Canuckleball

      7 months ago

      That would be funny to have 2 Luis Castillo’s in the same rotation.

      Even funnier if it was somehow bobblehead night for the better known Castillo on a night when the lesser Castillo was pitching.

      2
      Reply
  4. SadMsFan

    7 months ago

    Mariners 2025 rotation: Good, eh, decent, good, absolutely f***ing horrible, and now even more absolutely f***ing horrible. Last year whenever Diaz pitched, he s*** himself and tried to hide it, and somehow, everyone knew he stunk, except Mariners management, because they also s*** themselves.

    Last night Hancock’s sinker wasn’t sinking, his sweeper wasn’t sweeping, his change wasn’t changing, and his fastball…just wasn’t that fast. He was practically throwing batting practice. And now we have another pitch who throws batting practice. The only difference is Diaz is a lefty.

    1
    Reply
  5. Zippy the Pinhead

    7 months ago

    I watched Hancock’s debacle last night. I think that either he’s injured or he’s got dead arm, but either way everything came in straight, even the curveball. Put him on the DL and get him healed. Or, if he can’t, DFA him until he learns a knuckleball. Yeesh.

    2
    Reply
    • ayrbhoy

      7 months ago

      I think you’re projecting. To be fair, his FB Velo was up and one of his offspeed pitches had a 140 Stuff+ rating on Statcast.

      When you throw 40 pitches in the first inning of Start 1 of the year – he’s going to be utterly gassed for about a 1/3 of those pitches thrown.

      Hancock will be fine. We’ve seen him bounce back after a bad start last yr. He was fine after his horrendous 2nd start of 2024- the 8ER in 3.1ip v MIL. He ripped off 3 consecutive QS’s after that terrible start. In fact he finished the year with a 3.65 ERA from 4/13 onwards

      He is a back end plug-in SP.

      Reply
  6. Stevil

    7 months ago

    The bigger news is that Seattle ordered a number of torpedo bats.

    And with this potentially franchise-changing weapon, they should change their name to the Submariners and have Naymor as their mascot instead of that drunken moose.

    1
    Reply
    • Stevil

      7 months ago

      Opps, that’s Namor.

      Reply
      • ayrbhoy

        7 months ago

        Neymar?

        Reply
  7. Old York

    7 months ago

    Mariners could exploit April’s five off-days to run a four-man rotation (Gilbert, Miller, Woo, Castillo) while using Díaz as a “shadow starter” who absorbs 3-5 innings every fifth day.

    Reply
  8. lovableschmuck

    7 months ago

    .165 team batting average so far.No amount of good pitching can overcome that.

    2
    Reply
  9. ayrbhoy

    7 months ago

    That image of Johnathan Diaz for the Article-

    That is Diaz before he ate all the Pies, I assume

    Reply

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