Well, let's get into this. The Cubs have about 182-190M in payroll if they literally did nothing and filled from within. Boston is sitting at roughly 220M. Boston has already expressed the need to cut payroll. Boston also needs closer help. So, if they were willing, the Cubs pick up Morrow's option and package him with Quintana and Bryant for Sale and JD Martinez. That's 40.5M going to Boston and 53.75M coming back to the Cubs. For Boston, it's trading 3 years of JD for 2 years of Bryant and gives Boston another 22.5 M coming off the books at the end of the season.
The downside for the Cubs truly is that the market at 3B is either too expensive to really replace with quality or barren. Same at SS if they moved Javy to 3B. But I go with Happ at 3B and move Nico to CF, which lead me to my next move.
Call up Philly and the Mets, presuming they're not on his no trade list, and see what I can get for Heyward and 40M, which would free up 11M on this year's payroll.
Then it's call KC and offer up Russell and whatever else it might take to get Whit "I'll get his name right this time" Merrifield. That adds about 5M to payroll. After that, if they really wanted to shed payroll they could see what they could get for Chatwood.
Line up of
Merrifield 2B
Rizzo 1B
Martinez RF
Schwarber LF
Baez SS
Contreras C
Happ 3B
Hoerner CF
Rotation of
Darvish
Sale
Hendricks
Lester
Chatwood/Alzolay/Mills
Keeping Chatwood gives them a payroll around 197M to start the season.
You could remove Bryant and Martinez from the deal which would take about 6M off the payroll.