According to the Arizona Republic, Diamondbacks pitcher Micah Owings is one of the players to be named later in the Adam Dunn trade. Owings is 6-9 with a 5.93 ERA, but is hitting .288 with 1 HR. The newspaper suggests that he was put on waivers and another team claimed him, and that is why he wasn't included initially. If he were to be pulled back, the Diamondbacks would have to wait until the end of the season before they could trade him.
Owings is a bottom rotation type starter and hasn't shown any major improvements in his two years. I doubt they would move him to hitting, but he won't play any major role for the Reds.