The Reds announced on Monday that they've recalled left-hander Cody Reed from Triple-A Louisville, likely to take the long-relief spot in Cincinnati's bullpen from right-hander Keury Mella, who was optioned to Louisville in a corresponding move.

Reed hasn't pitched for the big league club since he was optioned back to Louisville in April. He made four appearances, over which he gave up three earned runs in five innings, with one walk and five hits, including two homers. Over parts of three big league seasons, Reed is 1-8 with a 6.65 ERA over 70 1/3 innings across 26 outings, including 12 starts.

Mella, who was recalled on July 27, never quite found his footing. He surrendered nine earned runs over 9 1/3 innings over four appearances, including a four-run outing in Sunday's 9-2 loss to the D-backs in which he gave up three homers. A hybrid starter, who was first called up last September, Mella has a career 8.10 ERA over 13 1/3 innings.