11/6 UPDATE:
RHP Corey Black (declared an MLB Rule 55 Minor League 6YFA last Friday) has signed a 2019 minor league contract with the Cubs and was assigned to AAA Iowa. So he will now be one of 71 Cubs minor leaguers who are (at present) eligible for selection in the 2018 Rule 5 Draft on December 13th (see list of Cubs minor leaguers eligible for selection in 2018 Rule 5 Draft below)
11/3 ORIGINAL POST:
Now that six Cubs major leaguers (RHP Jesse Chavez, LHP Jorge de la Rosa, LHP Jaime Garcia, INF Daniel Murphy, C Bobby Wilson, and LHP Justin Wilson) and 17 Cubs minor leaguers have been declared free-agents, the Cubs will need to focus on their MLB Reserve List (40-man roster) as it pertains to signing free-agents and acquiring players via trade or waiver claim, and protecting players from possible selection in the MLB Rule 5 Draft.