"There are still some guys out there that we're engaged with, talking to, getting a feel for, and I know other teams are as well. So we'll see how the market continues to progress. There are guys out there."
— Diamondbacks GM Mike Hazen
Right now, Arizona really appears only to have three pitchers who seem “guaranteed” to have 2017 bullpen spots: Jake Barrett, Randall Delgado and Fernando Rodney. Beyond that, there are a slew of possible candidates on the 40-man roster, more or less likely to have a roster slot.