Merryweather was recalled by the Blue Jays on Monday.
Merryweather was optioned in early May after posting a 6.94 ERA in 11.2 innings, though his 12:1 K:BB and 2.41 FIP told a very different story about his performance. He'll probably handle lower-leverage innings for now, but if his results start to reflect his underlying numbers he could move into a more important role.