Headlines

  • Albert Pujols To Interview For Angels’ Managerial Vacancy, May Be “Leading Choice”
  • Bill Schmidt Will Not Return As Rockies’ GM
  • Brian Snitker Will Not Return As Braves’ Manager In 2026
  • Angels To Have New Manager In 2026
  • Rays Sale To Patrick Zalupski’s Group Officially Completed
  • Guardians Promote Chase DeLauter For Wild Card Series
  • Previous
  • Next
Register
Login
  • Hoops Rumors
  • Pro Football Rumors
  • Pro Hockey Rumors

MLB Trade Rumors

Remove Ads
  • Home
  • Teams
    • AL East
      • Baltimore Orioles
      • Boston Red Sox
      • New York Yankees
      • Tampa Bay Rays
      • Toronto Blue Jays
    • AL Central
      • Chicago White Sox
      • Cleveland Guardians
      • Detroit Tigers
      • Kansas City Royals
      • Minnesota Twins
    • AL West
      • Athletics
      • Houston Astros
      • Los Angeles Angels
      • Seattle Mariners
      • Texas Rangers
    • NL East
      • Atlanta Braves
      • Miami Marlins
      • New York Mets
      • Philadelphia Phillies
      • Washington Nationals
    • NL Central
      • Chicago Cubs
      • Cincinnati Reds
      • Milwaukee Brewers
      • Pittsburgh Pirates
      • St. Louis Cardinals
    • NL West
      • Arizona Diamondbacks
      • Colorado Rockies
      • Los Angeles Dodgers
      • San Diego Padres
      • San Francisco Giants
  • About
    • MLB Trade Rumors
    • Tim Dierkes
    • Writing team
    • Advertise
    • Archives
  • Contact
  • Tools
    • 2025-26 MLB Free Agent List
    • 2026-27 MLB Free Agent List
    • Contract Tracker
    • Transaction Tracker
    • Agency Database
  • NBA/NFL/NHL
    • Hoops Rumors
    • Pro Football Rumors
    • Pro Hockey Rumors
  • App
  • Chats
Go To Pro Hockey Rumors
Go To Hoops Rumors

Pirates Select Isaac Mattson

By Darragh McDonald | May 20, 2025 at 3:45pm CDT

The Pirates announced today that they have selected the contract of right-hander Isaac Mattson. He’ll take the active roster spot of fellow righty Colin Holderman, who lands on the 15-day injured list due to right thumb inflammation. To open a 40-man spot for Mattson, infielder Nick Gonzales was transferred to the 60-day injured list. Noah Hiles of the Pittsburgh Post-Gazette relayed the Mattson and Holderman moves prior to the official announcement (link one, two and three).

It’s been an unfortunate season for Holderman so far, who already spent time on the IL due to a right knee sprain in April. He has allowed 15 earned runs in 15 innings, giving him a flat 9.00 earned run average. He has 11 strikeouts and walks apiece, giving him a 14.9% clip in both of those categories, both of those being worse than average.

Perhaps the injuries provide an explanation for his struggles, as he was far better in previous seasons. Over the 2023 and 2024 campaigns, he had a 3.52 ERA in 107 1/3 innings, pairing a 24.6% strikeout rate with a 9.7% walk rate.

Ideally, a bit of a rest period will get him healthy and back on track. It’s turning into a lost season for the Bucs, as their 15-33 record has them near the National League basement, with only the Rockies beneath them. Holderman is under club control through 2028, so it would make sense to prioritize his long-term health as opposed to benefitting the team in the short term.

Taking his place is Mattson, who is having a strong 2025 so far. The 29-year-old signed a minor league deal with the Bucs in December and has been with Triple-A Indianapolis all year so far. He has logged 18 innings for that club with a 2.50 ERA, 30.6% strikeout rate and 6.9% walk rate.

Those are encouraging numbers, though in a small sample. From 2021 to 2024, Mattson tossed 156 1/3 innings on the farm with a 3.91 ERA and 28.2% strikeout rate but a 13.7% walk rate. So far this year, he has basically cut that walk rate in half. If he can keep that up, perhaps he’ll get some runway to add to his major league track record, which currently consists of a 5.59 ERA in 9 2/3 innings. However, he does have options, so it’s possible the Bucs shuttle him back to Indianapolis when they need a fresh arm.

As for Gonzales, he landed on the 10-day injured list on March 28th due to a non-displaced fracture in his left ankle. His 60-day count is retroactive to that initial IL placement, so he’ll be eligible to be reinstated about a week from today. He started a rehab assignment on Saturday but it seems the Bucs will let him get a few more minor league contests under his belt, which is understandable since he’s been out of action for close to two months.

Photo courtesy of Charles LeClaire, Imagn Images

Share Repost Send via email

Pittsburgh Pirates Transactions Colin Holderman Isaac Mattson Nick Gonzales

Tigers Designate Tomas Nido For Assignment
Main
Mariners Select Casey Lawrence, Designate Austin Shenton For Assignment
View Comments (17)
Post a Comment

17 Comments

  1. amjr

    5 months ago

    And no Bubba Chandler yet. So Pirates-like. SMH.

    Reply
  2. 21Clemente21

    5 months ago

    Wait til next year, I mean 2040 when we have a new owner

    Reply
  3. pillow surrealistic

    5 months ago

    Thumb inflammation…sure.
    Why don’t you just DFA the guy.

    Reply
  4. mlb1225

    5 months ago

    I’ll always look forward to seeing Mattson getting the call, regardless of the situation the Pirates are in. I got to wtach him in Indy ball a few years ago, an always root for guys who climb their way up from that level to the Major Leagues. Hope he does well.

    Reply
  5. TheMan 3

    5 months ago

    the same thing was said about Solak regarding how well he hit at Indy and since his promotion he hasn’t shown why he deserves a roster spot

    1
    Reply
  6. Steinbrenner2728

    5 months ago

    “rachelmaddowishot” is an infamous known troll who keeps changing his name and profile to evade bans and mutes. His previous usernames are TheOpener, TrojanToss, TheFormerPlayer, Fan of the Umpires, 88 Brooklyn Dodgers,, VoiceofREASON, soulefh, and tikiagedola.

    I know this because he uses the same schticks. Lately he’s been using controversial and irrelevant political references while also making the occasional “trade top 4 prospects” and the “10 teams are better than this team” thing going, hoping to start long-winding reply chains.

    He used to make comments (some of you may be familiar with them) also such as: “underrated city/team you can ask anybody” and “great city, great fans, etc.” and “Gomez, Schlusser, Rome, Verducci, Stark, etc.”

    Please, just mute him and report him. I don’t know how/why he keeps coming back to MLBTR to do all of this for.

    3
    Reply
    • Mendoza Line 215

      5 months ago

      Thanks for the update George.
      Some people just like to play games.

      1
      Reply
      • TheMan 3

        5 months ago

        The Trib is reporting that Carmen has been optioned to Indy and Burrows is being promoted and will start against the Brewers on Thursday

        Reply
  7. Mendoza Line 215

    5 months ago

    Big jump from AAA.
    I think that mlb’s point is that Mattson is not highly rated but is getting a chance because he has worked hard to maximize his talent.
    The Pirates have nothing to lose.

    Reply

Leave a Reply Cancel reply

Please login to leave a reply.

Log in Register

    Top Stories

    Albert Pujols To Interview For Angels’ Managerial Vacancy, May Be “Leading Choice”

    Bill Schmidt Will Not Return As Rockies’ GM

    Brian Snitker Will Not Return As Braves’ Manager In 2026

    Angels To Have New Manager In 2026

    Rays Sale To Patrick Zalupski’s Group Officially Completed

    Guardians Promote Chase DeLauter For Wild Card Series

    Bruce Bochy Will Not Return As Rangers Manager Amid “Financial Uncertainty”

    Liam Hendriks Undergoes Ulnar Nerve Transposition Surgery

    Twins Fire Rocco Baldelli

    Giants Fire Bob Melvin

    Pirates Sign Manager Don Kelly To Extension

    Pete Alonso To Opt Out Of Mets Contract, Enter Free Agency

    Padres Place Ramón Laureano On Injured List Due To Finger Fracture

    Willson Contreras Will Consider Waiving No-Trade Clause But Prefers To Remain With Cardinals

    Cade Horton To Miss At Least One Playoff Series Due To Rib Fracture

    MLB To Take Over Mariners’ Broadcasts In 2026

    Nolan Arenado More Open To Waiving No-Trade Clause As Cardinals Plan To Rebuild

    Sonny Gray Will Consider Waiving No-Trade Clause This Offseason

    Nationals To Hire Paul Toboni As President Of Baseball Operations

    Astros’ Luis Garcia Will Miss 2026 Season Due To Elbow Surgery

    Recent

    Front Office Subscriber Chat With Anthony Franco: TODAY At 2:00pm Central

    Skip Schumaker The Favorite To Be Rangers’ Next Manager

    Offseason Outlook: Miami Marlins

    The Opener: Division Series, Rangers, Angels

    Report: Cardinals Ownership More Willing To Include Money In Trades

    The Marlins’ Catching Conundrum

    David Ross Hoping For Another Managerial Opportunity

    Orioles Re-Sign Jose Barrero To Minor League Deal

    Jarred Kelenic, Three Others Elect Free Agency

    Mets Notes: Alonso, Marte, Manaea

    MLBTR Newsletter - Hot stove highlights in your inbox, five days a week

    Latest Rumors & News

    Latest Rumors & News

    • Every MLB Trade In July
    Trade Rumors App for iOS and Android App Store Google Play

    MLBTR Features

    MLBTR Features

    • Remove Ads, Support Our Writers
    • Front Office Originals
    • Tim Dierkes' MLB Mailbag
    • Front Office Fantasy Baseball
    • MLBTR Podcast
    • 2025-26 MLB Free Agent List
    • 2026-27 MLB Free Agent List
    • Contract Tracker
    • Transaction Tracker
    • Extension Tracker
    • Agency Database
    • MLBTR On Twitter
    • MLBTR On Facebook
    • Team Facebook Pages
    • How To Set Up Notifications For Breaking News
    • Hoops Rumors
    • Pro Football Rumors
    • Pro Hockey Rumors

    Rumors By Team

    • Angels Rumors
    • Astros Rumors
    • Athletics Rumors
    • Blue Jays Rumors
    • Braves Rumors
    • Brewers Rumors
    • Cardinals Rumors
    • Cubs Rumors
    • Diamondbacks Rumors
    • Dodgers Rumors
    • Giants Rumors
    • Guardians Rumors
    • Mariners Rumors
    • Marlins Rumors
    • Mets Rumors
    • Nationals Rumors
    • Orioles Rumors
    • Padres Rumors
    • Phillies Rumors
    • Pirates Rumors
    • Rangers Rumors
    • Rays Rumors
    • Red Sox Rumors
    • Reds Rumors
    • Rockies Rumors
    • Royals Rumors
    • Tigers Rumors
    • Twins Rumors
    • White Sox Rumors
    • Yankees Rumors

    Navigation

    • Sitemap
    • Archives
    • RSS/Twitter Feeds By Team

    MLBTR INFO

    • Advertise
    • About
    • Commenting Policy
    • Privacy Policy

    Connect

    • Contact Us
    • Twitter
    • Facebook
    • RSS Feed

    MLB Trade Rumors is not affiliated with Major League Baseball, MLB or MLB.com

    Do not Sell or Share My Personal Information

    hide arrows scroll to top

    Register

    Desktop Version | Switch To Mobile Version