# Oakland Athletics prospect injuries

> Live situation record from CLSTR: https://clstr.news/situations/oakland-athletics-prospect-injuries
> Updated: 2026-09-09T03:37:14.000Z. Sources: 4. Developments: 2.

Oakland Athletics top prospects Leo De Vries and Jamie Arnold have both sustained significant injuries.

Leo De Vries, a highly regarded 19-year-old infielder, was initially placed on the seven-day injured list in late August due to a right shoulder injury. While early reports suggested he might participate in the Arizona Fall League if recovery progressed, it was later confirmed that De Vries requires surgery on his right shoulder in Arlington, Texas. The procedure is expected to necessitate an eight-month recovery period.

Pitcher Jamie Arnold was also sidelined following an incident where he was struck in the face by a 107 mph line drive while pitching for Triple-A Las Vegas. Arnold sustained a corneal abrasion as well as fractures to his maxillary sinus and intra-orbital, leaving his status indefinite.

## Timeline

### 2026-09-09: Athletics prospects Leo De Vries and Jamie Arnold sidelined by injuries

Oakland Athletics top prospects Leo De Vries and Jamie Arnold are sidelined indefinitely following shoulder surgery for De Vries and facial fractures for Arnold.

2 sources. https://clstr.news/cluster/athletics-prospects-leo-de-vries-and-jamie-arnold-sidelined-by-injuries

### 2026-08-25: Leo De Vries faces end of 2026 season due to shoulder injury

Athletics top prospect Leo De Vries may miss the remainder of the 2026 season due to a right shoulder injury that requires him to stop throwing for four weeks.

2 sources. https://clstr.news/cluster/leo-de-vries-faces-end-of-2026-season-due-to-shoulder-injury

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Cite as: Oakland Athletics prospect injuries. CLSTR, https://clstr.news/situations/oakland-athletics-prospect-injuries