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Introducing Our New MLB GM Tracker

By Tim Dierkes | January 23, 2025 at 7:18pm CDT

Examining the history of an MLB GM can be essential for research or informed speculation.  The problem?  There’s never been one place to easily reference each GM’s tenure…until now.

I’m proud to introduce our new MLB GM Tracker, a simple yet powerful tool for Trade Rumors Front Office subscribers that displays each team’s GM dating back to the year 2000.  To the best of our ability, we’ve compiled start and end dates for every GM during that period, including those who served in an interim capacity.  You can learn more about Trade Rumors Front Office here.

The MLB GM Tracker allows you to search by name and filter by team, narrow to current GMs, and filter and sort by the number of active days.  At the moment, MLB GM tenures range from Buster Posey’s 115 days to Brian Cashman’s 9,851 days on the job.

One note: for this tool, we’re using “GM” as an umbrella term to mean the team’s top decision-maker in baseball operations.  Many of these people hold the title of “president of baseball operations” or something similar.

Here’s a look at the team level:

We’ve connected the MLB GM Tracker to our robust MLB Contract Tracker as well.  Clicking the GM’s name in the GM tracker takes you to his entire tenure with that team, within the Contract Tracker.  Here’s Matt Klentak:

When you’re in the Contract Tracker, which currently goes back to 10-1-08, you can filter to any GM and adjust the date range to see that GM’s work across different teams.  Here are Alex Anthopoulos’s biggest deals across the Braves and Blue Jays:

To learn more about our suite of MLB research tools, click here.  A subscription to Trade Rumors Front Office costs just $29.89 per year.

Please note: GM tenure dates were compiled through our research.  If you find an error, please use our contact form.  

Also, David Forst’s tenure with the A’s had to be broken up into two separate entries due to the team changing its name.

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View Comments (31)
Post a Comment

31 Comments

  1. tom brunanskys black sock

    5 months ago

    Love checking out the GM Tracker while I cruise the boulevard in my magenta Geo Tracker

    3
    Reply
  2. A Different Mark P

    5 months ago

    !!!!!! You’ve topped yourself!

    3
    Reply
    • Pete'sView

      5 months ago

      Just in the nick of time! Yes Tim, this is a great idea and something that will provide me with data that I was going to have to otherwise cobble together. Kudos.

      Reply
  3. Dustyslambchops23

    5 months ago

    Amazing work.

    I now I can see Atkins incompetence all in one place.

    7
    Reply
  4. Father Theresa

    5 months ago

    Very cool, but Dave Dimbrowski isn’t actually the Phillies GM, is he? It was Sam Fuld last year, but he left. I’m not sure who replaced Fuld this year.

    Reply
    • Tim Dierkes

      5 months ago

      We’re using GM as an umbrella term to represent the top baseball operations decision-maker.

      5
      Reply
      • fansincethe80s

        5 months ago

        How do you quantify that? Seems that would be up to personal interpretation of the power dynamics inside each team.

        Reply
        • Tim Dierkes

          5 months ago

          I think the head of each team’s baseball ops has always been clear. I wouldn’t say it’s a personal interpretation.

          1
          Reply
    • kje76

      5 months ago

      Preston Mattingly is the current GM in title, though don’t think anyone would object to the point that Dombrowski controls the operation. Fuld didn’t leave, just received new duties.

      Reply
  5. gbs42

    5 months ago

    Thanks, Tim and team!

    Reply
  6. The Saber-toothed Superfife

    5 months ago

    Well, it’s easy to see how cautious Mike Elias is.

    Reply
    • The Saber-toothed Superfife

      5 months ago

      ….Preller,Friedman activity, Harris….well…..proving they should have hired……

      Reply
  7. hoof hearted

    5 months ago

    Jerry Dipoto is actually President of baseball operations. Hollander is the GM

    Reply
    • Rally Goose

      5 months ago

      They know that! It says in the article that they are using “GM” as.an umbrella term for the front office’s top decision maker, regardless of their official title.

      2
      Reply
  8. The Ranger Fan

    5 months ago

    @Tim Dierkes
    Tim, is the GM track tied to this site or would a person have to download something else, I’m currently a paid subscription subscriber now.
    Thanks Brother

    Reply
    • Tim Dierkes

      5 months ago

      The GM Tracker is part of every Trade Rumors Front Office subscription. No downloads required, it’s in your web browser.

      I’m hoping to do a tutorial on video.

      3
      Reply
  9. BrisbaneGreg

    5 months ago

    @Tim Dierkes
    Just for your information Tim, but this is the thing that’s finally tipped me over the edge & made me subscribe. Thank you for all the great work. Cheers.

    4
    Reply
    • Tim Dierkes

      5 months ago

      Awesome, thanks!

      Reply
    • Chuck from Uniontown

      5 months ago

      You’re going to love it. Best subscription, have had it for years.

      2
      Reply
  10. YourDreamGM

    5 months ago

    In the history of sports innovation this ranks right up there with the forward pass, the shot clock and the Roger Beshens Football Slider.

    9
    Reply
    • RogerBeshensFootballSlider

      5 months ago

      The Roger Beshens Football Slider will always stand strong against new ideas and come out on top.

      1
      Reply
    • Boston’s Alignment

      5 months ago

      Muted.

      Reply
  11. Chuck from Uniontown

    5 months ago

    I’m sure this would be a ridiculous amount of work, but having what GM drafted every player would be really cool information to sort through.

    Reply
  12. Homerunbunt

    5 months ago

    Cool tool

    Reply
  13. Baseball77

    5 months ago

    I like it! Thanks for putting in the work.

    Reply
  14. ninerbug

    5 months ago

    Awesome job! Would love to add a few fields. Namely, every trade between GM’s. To be able to quickly identify GMs with strong trade preferences, or grading wins/losses by GM vs team… Would be gold!

    2
    Reply
    • Tim Dierkes

      5 months ago

      We do have the ability to find trades between two specific GMs in our transaction tracker:

      mlbtraderumors.com/transactiontracker

      I don’t mention this as much because it is getting old and a bit clunky (and is not mobile-friendly). This year I am looking to build an MLB Trade Tracker that should be very cool.

      Reply
  15. SteveM7

    5 months ago

    Good stuff Tim, thank you!

    Reply
  16. 17dizzy

    5 months ago

    Where does John Mozeliak of the Cardinals rank now as compared to his first 5 years???
    It’s got to be a horrible difference.

    Reply
  17. suddendepth

    5 months ago

    Thanks for this and all your other work. This is helpful stuff!

    Reply
  18. biff_pocoroba

    5 months ago

    Very interesting…so Jurickson Profar is the second-largest free agent contract that AA has ever signed.

    Reply

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