Signing Yu Darvish to join the top of the Chicago Cubs starting rotation could cause make or break ramifications for the bottom of the Cubs roster, specifically Justin Grimm and Eddie Butler. Grimm and Butler are out of minor league options, which means if the Cubs try to send them to the minor leagues they must be exposed to the waiver process and then another team could claim one or both of them.
Projected rotation
Yu Darvish
Projected bullpen
Carl Edwards
Justin Grimm
Since the Cubs current competitive window opened up in 2015, there has been very little room on the roster for players to try to make the team in spring training.