To me, anyone can or might be traded, and I'm sure my views on who should be kept unless blown away by an offer differs from Bloom & Co.
Here is what I consider the core of our future. It does not mean these players are off limits, but all are under team control for 3 or more years, unless noted.
3B Devers
SS Bogaerts
OF Verdugo
1B Casas
2B Downs
SP Sale (likely not tradeable right now)
P DHernandez, Mata, Ward
Fringe:
Positional: Dalbec, Arroyo, Arauz, Jimenez, Lugo, Duran, Chavis, Yorke, Jordan, Chatham, Wong
Pitchers: Song, Taylor, Groome, Valdez, Houck
2 or less years (2021 & 2022)
FA after 2020: JBJ, Workman, Pillar
FA after 2021: Pedey, ERod, Moreland, Perez, Barnes, Hembree
FA after 2022: JD, Beni, Vaz, Eovaldi, Peraza, Plawecki
on 40 man roster but expendable:
Positional: Lin, Wilson
Pitchers: Walden, Brasier, Brewer, Weber, Triggs, Hall, Osich, Hart, Aybar, Godley, Brice, Springs, Covey, Stock