The Reds selected Kelly's contract from Triple-A Louisville on Saturday.
After spending the last six seasons in the Korea Baseball Organization with the LG Twins, Kelly signed a minor-league contract with Cincinnati on Aug. 8. Across his two starts with Louisville, he gave up four runs on eight hits and five walks while striking out two over eight innings. When Kelly takes the mound for the Reds, it'll mark the first time Kelly has pitched in MLB since 2018. Right-hander Alan Busenitz was designated for assignment by Cincinnati in a corresponding move.