OAKLAND -- Daulton Jefferies' young career is on hold, after the A's pitching prospect learned Thursday he needs season-ending Tommy John surgery.
According to A's general manager David Forst, who confirmed the news, it has not yet been decided who will perform the procedure, which typically requires a minimum of 14 months of recovery time.
The right-handed Jefferies, ranked by MLBPipeline.com as the organization's No. 8 prospect, was a second-round Draft pick of the A's just last year. The Cal Berkeley product made two appearances for Class A Stockton this season, tossing four scoreless innings in his debut before allowing six runs (two earned) in his next outing.