A little over a month ago on December 6th, the Cleveland Guardians selected 20 year old Diamondbacks prospect Deyvison De Los Santos (DDLS for short) in the rule five draft. Preston (Steak85) covered that news and the implications a few days later, give that a read if you haven't already.
Despite Brad Keller being a more recent example of a D-back taken in the Rule 5 draft with success at the major league level, putting up three solid season from 2017-2020, Diamondbacks fans instead immediately had PTSD flashbacks. In the winter of 2005, Dan Uggla was also left off the 40-man roster, and subsequently taken by the Marlins in the Rule 5 draft.