November 30th marks the deadline for all 30 MLB organizations to decide whether or not to tender a contract to players that are under team control, most notably arbitration eligible players. By the end of the day, teams have to decide whether or not a player under the arbitration process is worth keeping around at a raise or elect to non-tender them. Non-tendered players become free agents, eligible to sign with whomever they want.
The big news is that the D-backs have, according to Nick Piecoro, tendered first baseman Christian Walker a contract. He seemed a likely candidate to go, considering both his very underwhelming 2020, and the recent arrival of 1B/OF Jordan Luplow.