2:17pm: The Blue Jays have announced the move to designate Mills.

1:35pm: The Blue Jays will designate left-hander Brad Mills for assignment in order to clear a roster spot for top prospect Aaron Sanchez, reports Ben Nicholson-Smith of Sportsnet (via Twitter). Earlier today, Nicholson-Smith’s colleague, Shi Davidi, reported that Sanchez would be promoted.

The 29-year-old Mills pitched two innings for the Blue Jays after they claimed him off waivers from the A’s, yielding eight runs on seven hits and a walk with three strikeouts. Overall, he’s surrendered 16 runs in 18 1/3 innings of work at the big league level this season despite tremendous success at the Triple-A level. In 75 innings with Milwaukee’s Triple-A affiliate, Mills pitched to a 1.75 ERA with 9.2 K/9 and 2.2 BB/9.