Nothing has changed in the prognosis for the 33-year-old southpaw — who will be shut down from throwing for at least the next six weeks — this was done as a procedural move to free up a spot on the team’s 40-man roster for Matt Gorski who was promoted from Triple-A on Thursday.

Mayza hit the injured list over the weekend with a left lat strain and won’t resume throwing until the end of May. He’s likely out until the early portion of the second half.

The deal is now official. Mayza supplements Pittsburgh’s left-handed relief depth after splitting last year between the Blue Jays and Yankees. The 33-year-old southpaw was a mainstay in Toronto’s bullpen for the previous few seasons before struggling last year to the point that he was released in early July.