Karstens came to Pittsburgh as part of the Xavier Nady deal with the Yankees and has yet to give up a run to the inferior National League. Volquez came to the Reds in a deal for Josh Hamilton. Hamilton > Nady, therefore Volquez > Karstens, right?
As a team the Reds are batting .218/.279/.380 in August, but they just traded that do nothing cancer Adam Dunn. Small ball will rule the day and the Reds will score 10 runs tonight. Bank it.