6:38pm: The belief after an MRI is that the injury is “muscular and minor,” manager Bob Melvin told reporters including MLB.com’s Jane Lee (Twitter link). The hope is that Manaea will be back after the minimum (or close to it).
6:15pm: The Athletics have placed young southpaw Sean Manaea on the 15-day DL, per Susan Slusser of the San Francisco Chronicle (via Twitter). He has been diagnosed with a pronator strain in his left forearm.
Things could be worse, as it was scary to see the 24-year-old walk off with an apparent injury in his most recent start. Forearm troubles often precede more serious elbow issues, and it’s promising that there’s no current evidence of a problem further up the arm. On the other hand, as Carson Smith showed earlier this year, a preliminary assessment of a forearm injury doesn’t mean that the ulnar collateral ligament is safe.
Manaea represents an important part of Oakland’s present and future plans. He has struggled a bit early in his debut season, surrendering 33 earned runs and eight long balls in 49 1/3 innings. But Manaea has also shown promise, putting up 7.3 K/9 (with a 10.7% swinging strike rate) against 2.9 BB/9.
[Related: Updated Oakland Athletics depth chart]
It’s unclear at present how long the youngster will be out, but odds are that the club will take things slow. And it’s still possible that further assessment will reveal further cause for concern — or, at least, caution. For the time being, Erik Surkamp has been recalled to take Manaea’s spot on the active roster.