The Blue Jays outrighted Estrada to Triple-A Buffalo on Monday, Francys Romero of BeisbolFR.com reports.
He's no longer on the 40-man roster, but Estrada will remain in the organization after passing through waivers. The 27-year-old righty holds a 6.64 ERA and 19:11 K:BB across 20.1 frames in parts of two seasons for Toronto.