The Athletics have designated righty Chad Smith for assignment, the club announced. His roster spot will go to fellow right-hander Fernando Rodriguez, who was called up from Triple-A.

Smith, 25, was bombed for five earned runs in his 1 1/3 innings this year, surrendering five hits and three walks. He had thrown 11 2/3 solid frames at Triple-A, however, and has generally been fairly productive in his rather short time in the upper minors.

Oakland claimed Smith off waivers from the Tigers back in February. He lost his 40-man spot with Detroit when the team needed roster space for the addition of Joba Chamberlain.

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