The Blue Jays optioned Macko to Triple-A Buffalo on Tuesday, reports Keegan Matheson of MLB.com.
Macko will make his way back down to Triple-A after being called up May 17. With the big-league club, the 25-year-old posted a 1.50 ERA, 1.08 WHIP and 12:2 K:BB in 12 innings. Macko will be demoted to Buffalo in order to make room for Dylan Cease (hamstring) on the active roster.