The Orioles acquired left-hander Jayson Aquino from the Cardinals on Thursday in exchange for cash considerations.
Aquino, 23, went 1-0 with a 6.00 ERA in three games for the Cardinals this spring.
The Rockies signed Aquino in 2009 as a non-drafted free agent out of the Dominican Republic. He has gone 32-37 with a 2.94 ERA in 99 career Minor League games, including 98 starts.