The Oakland A’s got an unfortunate injury update on Wednesday, though not necessarily an unexpected one.
Starting pitcher Daulton Jefferies will undergo surgery to address thoracic outlet syndrome, reports Matt Kawahara of the S.F. Chronicle. The right-hander will have the operation next Monday, at which point the team will release further details.
It’s a tough blow for Jefferies, who battled through years of injuries in the minors to finally grab a spot in the A’s rotation this summer. He made eight starts before landing on the 15-day injured list retroactive to May 19 with what was initially deemed right arm irritation, but the diagnosis was quickly updated to thoracic outlet syndrome.