Rockies, Blue Jays swap minor league left-handers
The trade was announced Wednesday.
The 22-year-old Aquino went a combined 5-10 with a 5.13 ERA as a starter in Single-A and Double-A.
The 25-year-old Ybarra was 4-4 with a 4.42 ERA in 38 relief appearances in Double-A.
Toronto designated infielder Chris Colabello for assignment to make room on the 40-man roster.