The Athletics optioned Tur to Triple-A Las Vegas on Wednesday.
Tur will give up his spot on the active roster to lefty Drew Rom, who was called up from Triple-A in a corresponding move. After allowing three earned runs over two innings and tossing 33 pitches in Tuesday's 12-4 loss to the Rays, Yur was unlikely to be available out of the bullpen for at least the next day or two had he stuck around with the Athletics.