The Blue Jays optioned Macko to Triple-A Buffalo on Saturday.
Over his last four appearances out of the bullpen, Macko has been roughed up to say the least. The 25-year-old allowed nine earned runs over five innings, after previously recording three scoreless outings initially upon his return to the big-league club June 26. Toronto recalled Lazaro Estrada to take Macko's spot on the active roster for the time being.