The Blue Jays optioned Thornton to Triple-A Buffalo on Monday.

Toronto will cycle Thornton out of its bullpen for a fresher arm in lefty Ryan Borucki, who was recalled from Buffalo in a corresponding move. Thornton was unlikely to be available to pitch for at least two days after he struck out four and gave up a run in two innings of relief in Sunday's 22-7 win over the Orioles.

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