The Blue Jays activated Sosa (wrist) from the 60-day injured list Tuesday and outrighted him to Triple-A Buffalo.
Sosa no longer possesses a spot on the Blue Jays' 40-man roster, but he'll remain in the organization at Buffalo. The 26-year-old infielder last played for the Blue Jays in late May, as he's been working his way back from a right wrist contusion.