Welington Castillo, Patrick Corbin, Rubby De La Rosa, Randall Delgado, Daniel Hudson and Shelby Miller agree terms with Arizona Diamondbacks on Arbitration Friday

Welington Castillo, dbacks settle at $3.7M

— Jon Heyman (@JonHeyman) January 15, 2016

Daniel Hudson settles for $2.7M with Arizona -- $700K above the MLBTR prediction, which have been pretty spot-on: https://t.co/DKyCFuaNyH

— Jeff Passan (@JeffPassan) January 15, 2016

Randall delgado, dbacks agree to 1.275M deal

— Jon Heyman (@JonHeyman) January 15, 2016

Source: Patrick Corbin settles with the Diamondbacks for $2.525M.

— Jeff Passan (@JeffPassan) January 15, 2016

That's an interesting selection of amounts. Hudson was in his third and final year of arbitration, with Castillo in his second season, and Delgado + Corbin in their first. Maybe it's just me, but Randall seems to have been around for ever, having made his major-league debit with the Atlanta Braves back in June 2011. All the players come in above the estimates from MLB Trade Rumors, which had projected figures of $3.6 million for Castillo, $2.0 million (as Passan notes) for Hudson, $1 million for Delgado and $2.3 million for Corbin.

This leaves three Arizona players still currently unsigned, all of whom are in their first year of arbitration eligibility. These are, along with the MLBTR estimates: Rubby De La Rosa ($3.2 million), Shelby Miller ($4.9 million) and A.J. Pollock ($4.3 million).

Even though figures have now been swapped, teams and players are free to continue discussions, with the aim of reaching agreement rather than going to a hearing, where the team will have to explain to the player's face, why he isn't worth as much as he thinks. Never a good thing, that. The D-backs had their first arbitration hearing since 2001 last winter, Mark Trumbo winning his case and being awarded $6.9 million.

UPDATE. Add Miller to the list.

Source: Shelby Miller settles with the Diamondbacks at $4.35 million and avoids arbitration.

— Jeff Passan (@JeffPassan) January 15, 2016

That is a bit more of a surprise, coming in half a million below the expected cost. Guess the old-school W-L record worked in the team's favor, as far as potential arbitration was concerned!

UPDATE 2: Rubby De Le Rosa is on the books, per Jack Magruder, for $2.35 million, also well below the MLBTR of $3.2 million. That leaves A.J. Pollock as the only unsigned Diamondback at this point.