Hahn was optioned to Triple-A Nashville on Friday, Joe Stiglich of CSN California reports.

Hahn's latest disaster on the mound, a 3.2 inning, four-run outing against the Brewers, was enough to convince the A's that the 26-year-old needed more work in the minors. There's a very good chance he comes back this season, but he'll be an enormous risk until he can show something more than he has this year. Zach Neal was recalled and could replace Hahn or Rich Hill (groin) in the rotation.

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