MLB Trade Rumors posted its list of estimates for all the arbitration eligible players yesterday. Here's what they had to say about the Diamondbacks expected to be in that category. The chart below shows for each player their service time in years and days, 2015 salary, and the MLBTR estimate for a 2016 salary. It's listed in descending order of service time.
| Name | Service time | 2015 salary | 2016 salary |
| Welington Castillo | 5. |