Who do we need to sell? The Yankees knew they would turn around and sign Chapman again, and found a desparate Cubs team wanting to end 100 years of heartache to send them Gleyber Torres for a rental. We're wanting to bring back Rendon, but I don't see that happening if we trade him.
Need to sell? We could do a whole other thread on this, but, honestly, anyone who isn't going to be here in the 2021 season.
Rendon - His agent is Boras. Money freaking talks. And honestly, you just offered 300 million to a dude who hit .249. If you want him back, you can get him.
Doolittle - At the deadline, closers are a premium. Doolittle is the best closer on the market at the deadline. And he has an extremely reasonable team option next season. On top of that, he's not so ego-driven that he HAS to close. Let's move him before he gets hurt and turns into a pumpkin.
Max/Strasburg - Max will be a free agent by the time this team is ready to compete. He also gets 10/5 rights at the end of this season. If you're going to move him, now is the time. Strasburg has a player option if he truly doesn't like where he's traded.
Eaton - His team option is 10 million. Hard pass next season. Someone may bite at the deadline.
Dozier - He seems to have turned it around. Last time he got traded, the Dodgers gave up Devin Smeltzer and Luke Raley. This is the kind of trade you make to get yourself some B-/C+ prospects that you can later flip for middle relief, or use to add on and make bigger deals (i.e., the Tommy Milone or Travis Ott).
Kurt Suzuki - Having a good year, has a great deal of experience. Also is under contract through next season.
To me, those are the must sells. You gotta get something out of them, even if it's lower rated prospects.