Morales, 27, returned to the organization that originally signed him as a non-drafted free agent out of Venezuela in 2002 when the Rockies acquired him along with RHP Chris Martin from Boston in exchange for Jonathan Herrera on December 18, 2013.
From 2007-2011 in a Rockies uniform, Morales went 7-11 with a 4.83 ERA (147.1 ip, 79 er) in 102 games/15 starts.
Morales spent the last two-plus seasons in Boston (2011-13), during which time he went 6-7 with a 3.90 ERA (134.0 ip, 58 er) in 93 games/10 starts. In 2013, Morales went 2-2 with a 4.62 ERA (25.1 ip, 13 er) in 20 games/one start as a member of the World Champion Red Sox.
Overall, the left-hander is 13-18 with 11 saves and a 4.38 ERA (281.1 ip, 137 er) in 195 games/25 starts between the Rockies and Red Sox. Morales has held left-handed hitters to a .194 (65-for-335) average in his career.
The Rockies now has a full 40-man roster.