According to Mark Sheldon:
Quackenbush is about to turn 29. He was in the Padres organization last year and split time between the big league club and AAA. His xFIP in 26.1 innings for the Padres was 5.10. He had a similar performance (xFIP 5.05) in 60 appearances for the Padres in 2016.
Quackenbush is not “veteran help to the bullpen.” But this is a no-risk signing for the Reds, since it’s a minor league deal.