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Royals Acquire Mike Yastrzemski

By Steve Adams and Tim Dierkes | July 31, 2025 at 6:23pm CDT

The Royals have acquired outfielder Mike Yastrzemski from the Giants in a last-minute deadline swap. In exchange, the Giants will receive right-handed pitching prospect Yunior Marte. Mark Feinsand of MLB.com was the first to report that Yastrzemski was headed to Kansas City.  The deal is now official.

Yastrzemski, 34, has slipped to a 97 wRC+ in 372 plate appearances for the Giants this year in his seventh season with the club.  From 2023-24, he’d managed a 109 mark.  A left-handed hitter, Yaz has always excelled against right-handed pitching, including a 118 wRC+ this year.

Yastrzemski, who has primarily played right field in the Majors, joins a 54-55 Royals team that nonetheless sits three games back in the Wild Card race.  He’s a perfect pairing with the newly-acquired Randal Grichuk, a right-handed hitter.  Rookie Jac Caglianone, who had spent time in right field, is on the IL with a hamstring strain.  Yastrzemski, famously the grandson of Hall of Famer Carl, will be eligible for free agency after the season.

As Justice delos Santos of the San Jose Mercury News notes, “With Yastrzemski gone, the door is open for Luis Matos to step into a starting role [for the Giants]. It’s very possible Grant McCray and Marco Luciano see some time in right field as well.”

In parting with their longtime right fielder for the next few months, the Giants add Marte.  The 21-year-old has spent the season in A ball, posting a 2.74 ERA and 18.4 K-BB% in 19 starts.  Baseball America assigned him a 50 high risk grade, noting that he “features two above-average pitches in his arsenal.”

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Kansas City Royals Newsstand San Francisco Giants Transactions Mike Yastrzemski Yunior Marte (b. 2003)

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View Comments (69)
Post a Comment

69 Comments

  1. angt222

    20 hours ago

    Oh wow! SF probably gives Gilbert a call up to the show

    2
    Reply
    • bag o ballz

      20 hours ago

      I would think one of luciano, meckler, mccray would come up with them all on the 40 man

      2
      Reply
      • Ernie Riles

        19 hours ago

        probably see if Encarnacion can hack it (I doubt it) – he is out of options, on rehab stint

        2
        Reply
        • Pete'sView

          18 hours ago

          Encarnacion just needs to stay healthy. He can hit and he’s a pretty good defensive player especially considering his size.

          Reply
        • Ann Porkins

          18 hours ago

          At the very least, Jerar can slot into the “righty bat off the bench” role that Mayos was ill suited for.

          I’m guessing Matos gets first dibs at playing everyday, Jerar takes Yaz’s roster spot.

          Perhaps they’ll ditch Dom Smith and Wilmer in August at a point where a contender can claim them off waivers (the Giants would love to let Wilmer jump to a contender, he’s been such a good Giants and deserves a chance at the playoffs). If they free up first base/DH at bats, maybe Jerar gets a lot of those reps and they bring up some of those young guys like Meckler, McCray, and the newly acquired Gilbert. I’d wager they could clean house on the rest of their impending free agents via waivers in mid-August if they continue to drop in the standings. If they somehow right the ship and still a few games out, then perhaps they stand pat with those guys.

          Regardless, I’ll miss Yaz, but it’ll be nice to have some more at bats for guys who can hopefully step into bigger roles on the 2026 roster.

          4
          Reply
      • Slash78

        17 hours ago

        Neither Meckler nor McCray have been putting up the numbers to get promoted. Luciano does massive damage to LHP but against RHP this season he might as well be swinging a popsicle stick.

        1
        Reply
        • bag o ballz

          2 hours ago

          yeah but the point is that they are all on the 40. man so you probably would rather give them a shot than to add another guy to the 40 man and DFA someone on a whim just because you just got them

          Reply
        • Slash78

          26 mins ago

          There is a spot open on the 40-man. Though the biggest need is at catcher, so they would probably call up the catcher they got for Doval before an OF.

          Though yesterday I completely missed the fact that Jesus Rodriguez was a catcher. A decent hitting one too. Wish I realized that when arguing about Bailey yesterday and others insisting Bailey wasn’t a backup catcher no matter how badly he hits because “Buster trusts him”. I think we’ll see how far that “trust” really goes.

          Reply
        • bag o ballz

          20 mins ago

          Mccray is on the bus today and they are adding teng

          Reply
        • Slash78

          5 seconds ago

          Still leaves them one short on the 26-man.

          And I was wrong, they had only 38, so Teng makes 39.

          For once I can’t really be mad whoever they call up because there isn’t a clear favorite for me. McCray and Meckler haven’t been lighting the world on fire. Hunter Bishop is having his best season in years (not say that much) and is in the range of the other two stats wise. The plus side is whoever gets called up would create playing time for him. Which he needs after years of injuries limiting his playing time.

          Luciano would only be versus LHP and mean Ramos would have to shift to RF when he starts. And Bryce Eldridge needs at least two week where he’s really on fire before getting called up.

          Reply
    • Brett Baty’s Bat

      20 hours ago

      Absolutely. Could see that train coming through the tunnel!
      Gilbert gets the call and his first game is at CitiField. Hilarious, but not expected.

      1
      Reply
      • sluman46953

        18 hours ago

        Make it good he pinch hits in the 9th giants down 3 bases loaded 3 balls 2 strikes he’s facing the reliever the Mets got from the giants. Here the pitch ! Grand slam home run !!!!!! Wow what a call !!

        Reply
    • Jean Matrac

      17 hours ago

      I’d think Matos takes over everyday in RF. He’s fine defensively. They need to see if the bat can live up to the potential, and giving him consistent ABs is the way to do it.

      1
      Reply
  2. Westbound and down

    20 hours ago

    Haha. Love to see it.

    1
    Reply
  3. Motor City Beach Bum

    20 hours ago

    KC is pushing their chips in. Good for them.

    15
    Reply
    • BuyBuyMets

      19 hours ago

      Even now, they don’t have nearly enough offensive chips to make any kind of postseason run.

      1
      Reply
  4. Rickover50

    20 hours ago

    No Jv to Detroit.. darn

    7
    Reply
    • stymeedone

      7 hours ago

      Harris offered Alex Cobb.

      Reply
  5. Cave

    20 hours ago

    This is unexpected, especially after the Grichuk trade! Can never have too many outfielders I suppose.

    3
    Reply
    • Billy Idol

      20 hours ago

      Have you reviewed their outfield production prior to the recent deals??

      2
      Reply
  6. Clofreesz

    20 hours ago

    Low-price pickup for good defense.

    3
    Reply
  7. holecamels35

    20 hours ago

    Good for them. Not sure why more teams do t do this considering how much organizational filler was traded.

    1
    Reply
  8. Wtp

    20 hours ago

    Thank god

    2
    Reply
  9. Westbound and down

    20 hours ago

    Padres fans wish list entering the season:
    — Diamondbacks collapse. ✅
    — Giants collapse. ✅
    — Dodgers collapse. (Pending)

    10
    Reply
    • Rounding3rd

      19 hours ago

      Rockies collapse? Oh, wait…. lol

      3
      Reply
    • Candlestoked

      18 hours ago

      The Padres know all about collapsing!

      4
      Reply
      • Slash78

        17 hours ago

        Pads fans are hoping the rest of the division collapses faster than their team this year.

        3
        Reply
  10. Rsox

    20 hours ago

    Yaz and Grichuck give the Royals OF some actual hope offensively.

    Surprised Pham wasn’t traded for the 4th straight deadline

    6
    Reply
    • Clofreesz

      20 hours ago

      He’ll get waived and sign with a playoff team soon.

      Teams he played since 2021: SD, CIN, BOS, NYM, ARI, CHW, STL, KC, PIT. Man’s been all over the place and slapped Joc Pederson, dissed the Mets, and stroked for a fan.

      1
      Reply
    • Graymond Dreen

      20 hours ago

      That simply says how bad the Royals OF has been. Yastrzemski and Grichuk are 4th or 5th OFs at best on a good team.

      3
      Reply
      • Billy Idol

        20 hours ago

        💯 correct

        Reply
      • otis26

        20 hours ago

        Regardless, he’s an upgrade. The Royals got better today and traded away garbage to do it. Good day for Royals fans.

        5
        Reply
        • RoyalsFanAmongWolves

          19 hours ago

          I wouldn’t call Freddy Fermin garbage. He’s a legitimate backup

          Reply
    • Pete'sView

      18 hours ago

      Royal fans will love Yaz. The guy’s a pro at everything he does (except hitting lefties which we won’t need to do now in KC).

      4
      Reply
  11. dirtyjog

    20 hours ago

    Of all the deadline trades, this was one of them.

    7
    Reply
  12. scottn59c

    20 hours ago

    I’ll miss the human being more than the baseball player.

    6
    Reply
    • foppert3

      19 hours ago

      Ha ha ha. Oh dear. Well Yaz is obviously a better human than you !

      Thanks Yaz. Good luck.

      3
      Reply
  13. Legacy

    20 hours ago

    Hey at least Kansas City now has an outfield.

    2
    Reply
  14. Fever Pitch Guy

    20 hours ago

    Just in time for a Fenway homecoming next week, cool.

    4
    Reply
    • RoyalsFanAmongWolves

      19 hours ago

      does his grandpa live in Boston? I know his grandpa is a major-league Hall of Famer.

      1
      Reply
      • Fever Pitch Guy

        19 hours ago

        Royals – He lives not far from Boston in Maine last I heard, I’m sure he’ll be at Fenway next week health permitting.

        3
        Reply
  15. DirtyDavis

    20 hours ago

    With Twins, White Sox and Guardians selling it makes sense for Royals to go for it now

    5
    Reply
  16. Kansas_City

    20 hours ago

    Good day for Royals. 3 controllable starting pitchers to fill 2 open spots in rotation. Now rental of league average or higher outfielder.

    1
    Reply
  17. coachsixstring

    20 hours ago

    SF took MJ MELENDEZ???

    Reply
    • otis26

      20 hours ago

      Please pray.

      2
      Reply
    • RoyalsFanAmongWolves

      19 hours ago

      no, Our number 20 prospect yunior Marte RHP

      2
      Reply
  18. mafiabass

    20 hours ago

    I was working at a gaming shop, listening to the game when he homered in his first Fenway game. It was magical. I’d love to see him play for the Sox at some point, but there’s no fit

    Reply
  19. brat922

    20 hours ago

    Wishing Yas the best in KC. He made the play of his life last night in Oracle Park. I felt then he was trying to save his job. Had to leave the restaurant as I started crying. Been there done that watching my Dad get traded. It’s hard as hell.

    3
    Reply
  20. RogerForTheHall

    20 hours ago

    Yunior Marte is heading to San Francisco for Yastrzemski. Had a 2.74 ERA in 19 starts for A Columbia. Second time a pitcher named Yunior Marte has gone from the Royals to the Giants.

    1
    Reply
    • Wilmer the Thrillmer

      19 hours ago

      Yep, the other Yunior Marte is pitching in Japan this year.

      Reply
  21. Because I was born in PIT

    20 hours ago

    It would have been so poetic for him to land with the Red Sox. Still time though.

    Reply
    • mafiabass

      2 hours ago

      I agree, but there’s no obvious fit right now. They’d have to move two of Jarren Duran, Wilyer Abreyu, and Tristan Casas (what? Carl moved to 1st later in his career.) Or Yoshida I suppose, but he’s going to have to have a monster rest of the year to attract interest.

      Reply
  22. AI GM

    20 hours ago

    Royals nice picking up scraps deadline

    1
    Reply
    • oldgfan

      18 hours ago

      Probably the best 4th Outfielder a team could get. Very sound fundamentals, accurate arm, good on the bases. Hits for power and average with good OBP. Like any other player has his spurts and slumps but definitely plays the game with passion.
      So, scrap ?
      Not.

      2
      Reply
      • Slash78

        17 hours ago

        There have been 5 walk off Splash Hits (home runs hit into the Bay).

        Bonds and Crawford have one each. Guess who has the other 3? Just don’t look up his first major league hit.

        1
        Reply
  23. Dumpster Divin Theo

    19 hours ago

    Now they just need Hawk Harrelson jr

    Reply
  24. Redwolves3

    19 hours ago

    Best wishes to “Forever Giant” Yaz

    2
    Reply
  25. Wilmer the Thrillmer

    19 hours ago

    Yaz was my favorite Giant despite my namesake. He started strong this year and faded the last couple of months. Still, he was the only truly “excellent” outfielder the Giants had. It’s painful watching Ramos break in on fly balls and then miss them over his head. Lee is okay but not great. Lee was a huge, huge overpay by the former regime. Good luck Yaz, you were a wondeful Giant and one of the best stories of how perserverance pays (turned 29 his rookie season) in recent memory.

    5
    Reply
    • foppert3

      19 hours ago

      Nice work Wilmer ! That’s how it is done. Yaz is a great lesson in hanging tough. Let’s hope he does it for a bit longer.

      1
      Reply
    • Pete'sView

      18 hours ago

      Yes re Yaz AND Lee is a very good outfielder.

      Reply
  26. Sparky1000

    19 hours ago

    Good luck in KC, Yaz!

    2
    Reply
  27. TellItGoodbye

    19 hours ago

    Ironic that he’s traded the day after making arguably the best MLB catch of the year.

    1
    Reply
  28. DarkSide830

    19 hours ago

    “Somehow, Yunior Marte returned.”

    Reply
  29. آلي مكبيل_.._.بيتزا بيبيروني آشتون كوتشر

    19 hours ago

    Was so hoping he would end up with the Sox.

    Reply
  30. whyhayzee

    18 hours ago

    Not sure how I feel about this. Y A Z.

    Reply
  31. Jean Matrac

    17 hours ago

    Yaz has all the tools except one. He can run, has a strong accurate arm, good range, good glove, good on the basepaths, and good power when he connects. He’d be an AS if he had better bat to balls skills. I always liked Yaz. Well, actually it was more like a love/hate thing. Loved seeing in RF, but was pessimistic seeing him at the plate.

    But I was hoping he’d go to a team with a more lefty-hitter friendly ballpark. Kaufman is much like Oracle. It’s a little better in general, and good for 2Bs and 3Bs, but worse than Oracle for HRs for LHHs. Good luck to him. I hope he does well.

    Reply
    • oldgfan

      15 hours ago

      I liked when he came up to the plate.
      Mostly because his walk up music was a portion of Led Zeppelin’s “When the levee breaks” Hope he continues that with his new team. Should be a solid platoon with Grichuk.

      Reply
  32. scrambledeggs

    16 hours ago

    It’s about time the nepo got traded.

    Reply
  33. norcalblue

    15 hours ago

    Really nice to read all the positive comments here about Yaz and how his story impacted fans. Best wishes to all of you for taking the time to write your thoughts.

    1
    Reply

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