Daulton Jefferies

#66 RP / Oakland Athletics / EXP: 0YRS Height: 6-0 Weight: 182 lb Age: 26 College: California Bats/Throws L/R

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Player News
  • Jefferies (thoracic outlet syndrome) won't return this season, Matt Kawahara of the San Francisco Chronicle reports. He had thoracic outlet syndrome surgery Monday, which included the removal of his first rib. Jefferies' entire pro career has been altered by consistent arm injuries, and while he has made it back from Tommy John surgery, this next challenge could be even tougher.

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  • Jefferies will undergo surgery to address his thoracic outlet syndrome, Matt Kawahara of the San Francisco Chronicle reports. Jefferies received a second opinion Tuesday after being diagnosed with thoracic outlet syndrome, and he'll ultimately require a procedure. The Athletics won't provide an update on the right-hander's status until after he undergoes surgery Monday, but the procedure often carries a recovery timetable of several months. While it's possible that Jefferies will be cleared for game action in the final few weeks of the season, it wouldn't be surprising to see the team exercise caution with his rehab process since Oakland is unlikely to be in playoff contention late in the year.

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  • Jefferies will visit Dr. Gregory Pearl on Tuesday in Dallas to get a second opinion on his thoracic outlet syndrome diagnosis, Martin Gallegos of MLB.com reports. If the diagnosis is confirmed, we likely won't see Jefferies pitch again until 2023. Durability has been a major issue for him throughout his career, and he registered a 5.72 ERA, 1.37 WHIP and 28 strikeouts in 39.1 innings this season.

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  • Athletics manager Mark Kotsay said Jefferies (arm) played catch Wednesday, Matt Kawahara of the San Francisco Chronicle reports. Jefferies has yet to receive a second opinion regarding whether he'll require thoracic outlet syndrome surgery to address the irritation he had been experiencing in his right arm, but the Athletics' willingness to have him start throwing again suggests that he's at least made some progress since being placed on the injured list May 20. Even if he ends up avoiding surgery, Jefferies could require a lengthy buildup program that will likely include multiple minor-league rehab starts, so he shouldn't be expected to rejoin the Oakland rotation anytime soon.

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  • Jefferies (arm) was transferred from the 15-day injured list to the 60-day injured list Sunday, Matt Kawahara of the San Francisco Chronicle reports. The 26-year-old landed on the 15-day IL last week with right arm nerve irritation, but shortly thereafter he was diagnosed with thoracic outlet syndrome. Jefferies was headed to receive a second opinion, and the shift to the 60-day IL appears to confirm the injury. It remains unclear whether or not the right-hander will require surgery to address the issue, but he'll be unavailable for the foreseeable future regardless.

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Stats

YearTeamAPPGSINNWLSKBBIHAERAWHIP
2022 OAK 8 8 39.3 1 7 0 28 8 46 5.72 1.37
2021 OAK 5 1 15.0 1 0 0 8 4 11 3.60 1.00
2020 OAK 1 1 2.0 0 1 0 1 2 5 22.5 3.50

FULL CAREER STATS

Next Matchup

SituationRecordERAINNERK
vs TORONTO -1 4.39 4.1 2 2
@ OAKLAND-ALAMEDA COUNTY COLISEUM 0 0 0 0 0

Last 7 Games

DATEOppWLSINNHAERABBIKWHIP
5/18
vs 
- 1 - 4.0 7 6.62 3 5 2.50
5/13
vs 
- 1 - 6.0 5 5.70 0 4 0.83
5/08
- 1 - 5.0 7 6.38 0 3 1.40
5/02
vs 
- 1 - 5.0 11 6.16 0 4 2.20
4/26
- 1 - 4.0 4 4.50 2 3 1.50
4/20
vs 
- 1 - 6.0 3 1.80 0 5 0.50
4/15
- 1 - 4.1 7 4.50 1 2 1.85

Upcoming Games

dateOpptimeScheduled Starter
7/03
4:10 PM Robbie Ray
7/04
vs 
9:07 PM Alek Manoah
7/05
vs 
9:40 PM Yusei Kikuchi
7/06
vs 
3:37 PM Jose Berrios
7/08
vs 
9:40 PM Framber Valdez
7/09
vs 
4:07 PM Justin Verlander
7/10
vs 
4:07 PM Luis Garcia

Full Athletics Schedule

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