The Red Sox announced they've sent Morales and minor league reliever Chris Martin to the Colorado Rockies for infielder Jonathan Herrera.
Herrera adds depth to the Red Sox' infield, and likely projects as a reserve. He appeared in 81 games last season for Colorado and his .292 with a .364 OBP and a .701 OPS. Herrera played at least five games at shortstop, second base and third base in each of the last four seasons.
Morales, a lefthanded reliever, had been with the Red Sox since 2011. He appeared in 20 games last season after battling injuries. Morales played for the Rockies, who signed him as an amateur free agent, from 2007 to 2011.
Martin spent the 2013 season in Double A Portland and Triple A Pawtucket.