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Daulton Jefferies Diagnosed With Thoracic Outlet Syndrome

By Steve Adams | May 20, 2022 at 7:31pm CDT

The A’s placed right-hander Daulton Jefferies on the injured list earlier today amid a series of roster moves, also optioning lefty Kirby Snead and recalling righty Jake Lemoine and left-hander Zach Logue. The A’s originally stated that Jefferies had some nerve irritation in his right arm, but manager Mark Kotsay now gives reporters a much more ominous update, revealing that the 26-year-old righty has been diagnosed with thoracic outlet syndrome (Twitter link via Matt Kawahara of the San Francisco Chronicle). He’s receiving a second opinion.

While not as common as Tommy John surgery, thoracic outlet syndrome often requires surgical repair — an operation that involves removing a portion of the player’s rib in order to alleviate nerve pressure. The success rate for pitchers returning from TOS hasn’t been as strong as those returning from the more common Tommy John surgery, though there are plenty of examples of hurlers who’ve returned to have successful careers. Arizona’s Merrill Kelly, for instance, had thoracic outlet surgery in September 2020 and was back on the mound for a slate of 27 starts in 2021. He’s made another eight starts of 3.27 ERA ball this season.

It’s yet to be seen whether Jefferies will undergo surgery, which would likely end his season. That’ll surely hinge on what he and the A’s hear in his forthcoming second opinion. Even in the event of a non-surgical route, an absence of some note seems safe to expect.

Selected by the A’s with the No. 37 overall pick back in 2016, Jefferies entered the year with just 17 big league innings under his belt. However, the Athletics’ offseason fire sale shipped both Chris Bassitt and Sean Manaea to other clubs, opening the door for Jefferies to win a long-term spot on the starting staff. Jefferies posted a 1.17 ERA through three starts but has been rocked for 23 runs over 24 innings in his past five turns. Overall, he carries a 5.72 ERA with a 16.3% strikeout rate, a 4.7% walk rate and a 46.6% grounder rate. Metrics like fielding independent pitching (3.76) and SIERA (4.15) feel he’s been a good bit better than his ERA would indicate.

The A’s still control Jefferies for five seasons beyond the current campaign, so even if he doesn’t factor into the mix again this season, he should have ample opportunity down the road. For the time being, with Jefferies sidelined, Oakland will look to Frankie Montas, James Kaprielian, Paul Blackburn and a returning Cole Irvin, who’s slated to come off the injured list and start a game this weekend. Logue, recalled today, will probably step directly into the rotation. One of four players acquired in the trade that sent Matt Chapman to Toronto, he’s already made four appearances (three starts) and pitched to a 2.04 ERA with an 18.9% strikeout rate against a 6.8% walk rate in 17 2/3 frames.

Should the A’s need another starter in the near future, they have a pair of other newly acquired options to evaluate. Right-hander Adrian Martinez, acquired from the Padres in the Manaea trade, made his big league debut in a doubleheader against the Tigers last week and tossed 5 1/3 shutout innings with three strikeouts and no walks. Fellow right-hander and trade acquisition Adam Oller, who came over from the Mets as part of the return for Bassitt, could be an option as well. He’s already made four big league starts with the A’s, though he’s been tagged for 20 runs in 14 2/3 frames.

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Oakland Athletics Daulton Jefferies Jake Lemoine Kirby Snead Zach Logue

Dodgers Sign Pedro Baez To Minor League Deal
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Injury Notes: Wade, E-Rod, Skubal, Murphy
View Comments (9)
Post a Comment

9 Comments

  1. Curly Was The Smart Stooge

    3 years ago

    Where is Dr. Frankenstein when we need him? A little cut there, a little nip there. As long as they’re not afraid of fire, we’re good to go?

    1
    Reply
    • dadofdonnydownvote

      3 years ago

      That last name Jefferies brings back some memories. I remember opening open Topps packs hoping to find a Gregg Jefferies rookies card in the late 80’s. Gregg had a nice career but was done playing in his early 30’s. Probably a distant relation that’s not a common last name.

      Reply
  2. partyatnapolis

    3 years ago

    that sucks for him… this surgery never works to much success.

    4
    Reply
  3. Curly Was The Smart Stooge

    3 years ago

    Wait, I can’t stop wanting to dance, I must have Restless legs syndrome. I can’t boogie enough.
    When are we going to stop creating diseases for our short comings?

    3
    Reply
    • Yankee Clipper

      3 years ago

      Cotard’s Syndrome?

      If you can’t boogie enough, dig deeper, or use a smaller finger – says Confucius.

      Reply
      • Curly Was The Smart Stooge

        3 years ago

        @Yankee Cotard’s delusion, also known as walking corpse syndrome or Cotard’s syndrome, is a rare mental disorder in which the affected person holds the delusional belief that they are dead, do not exist, are putrefying, or have lost their blood or internal organs.[1] Statistical analysis of a hundred-patient cohort indicated that denial of self-existence is present in 45% of the cases of Cotard’s syndrome; the other 55% of the patients presented with delusions of immortality.[2]
        @Yankee Walking Dead? I’m speechless

        1
        Reply
  4. Curly Was The Smart Stooge

    3 years ago

    @Yankee Clipper, for the first time on this site, you’ve left me speechless, & wanting to lock my front door (& every other damn door)

    2
    Reply
  5. algionfriddo

    3 years ago

    Any chance the A’s might have an interest in Mitch White (LAD)? The Dodgers don’t make much use of him. A starting gig with the A’s might be just the thing.

    2
    Reply
  6. KamKid

    3 years ago

    A’s fans impressions of Logue so far? He’s the one guy I didn’t like included in that trade from Toronto’s perspective.

    Reply

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