The D-backs have been busy already this winter on both the playing and non-player side of things.
First they remade their front office by hiring GM Mike Hazen, who in turn hired Torey Lovullo to replace Chip Hale as manager.
Then they dealt infielder Jean Segura to the Mariners in a five-player trade that netted right-hander Taijuan Walker and infielder Ketel Marte.
Friday, after non-tendering right-hander Rubby De La Rosa and catcher Welington Castillo, the D-backs agreed to terms on a two-year, $4 million deal with free-agent backstop Jeff Mathis.