Hatcher was outrighted to Triple-A Nashville on Monday, Julian McWilliams of The Athletic reports.
Hatcher allowed three runs on three hits in the ninth inning to blow the save Sunday against the Angels.
Hatcher had his contract selected by the Athletics on Saturday, Susan Slusser of the San Francisco Chronicle reports.
Hatcher was outrighted to Triple-A Nashville on Sunday, Susan Slusser of the San Francisco Chronicle reports.
Hatcher was designated for assignment by the Athletics on Friday.
Hatcher has fired four scoreless innings across three June appearances, allowing three hits and four walks while recording five strikeouts.
Hatcher (3-2) allowed an earned run on three hits over two frames in an extra-innings loss to the Rays on Monday. He also recorded two strikeouts.
Hatcher (3-1) allowed an earned run on two hits and two walks over 1.2 innings in an extra-innings loss to the Yankees on Saturday. He also recorded a strikeout.
Hatcher allowed two unearned runs on three hits and a walk over three innings in a loss to the Astros on Monday.
Hatcher (3-0) fired a scoreless two-thirds of an inning in an extra-innings win over the Orioles on Saturday, allowing one walk.