Raley's contract was selected by the Reds on Sunday.
Raley signed a minor-league contract with the Reds in January after spending the past five seasons pitching in the KBO. The southpaw last pitched in the majors with the Cubs in 2013 and posted a 5.14 ERA and 1.36 WHIP over 14 innings. Although his addition to the 40-man roster is an encouraging step in his comeback, Raley is unlikely to play a significant role for the major-league club this season.