The Red Sox confirmed Thursday night that they have made a deal to sign Colorado Rockies left-hander Franklin Morales in exchange for a player to be named later or cash considerations.
To make room on the roster for Morales, Hideki Okajima has been designated for assignment.
Morales, 25, has an 0-1 record and a 3.86 ERA in 14 relief appearances this season for the Rockies.
Okajima, 35, is 1-0 with a 4.32 ERA and six strikeouts in seven games with the Red Sox this season.