While the class of FA's post 2018 is legendary, the class post 2017 is no slouch. Notable names are..
Eric Hosmer 1B
Mike Moustakas 3B
Yadier Molina C
Carlos Santana 1B
JD Martinez OF
Lorenzo Cain CF
Carlos Gonzalez RF
Andre Ethier RF
Jay Bruce RF
Jake Arrieta SP
Johnny Cueto SP (he can opt out)
Yu Darvish SP
Masahiro Tanaka SP
Wade Davis CL
There are plenty more lower tier pitchers, but Arrieta, Darvish, Cueto and Tanaka make for an intriguing top of the rotation conversation for sure. With a cap of $197 mil for 2017, it is hard to believe they'd stay under, especially since they are already at $194,669,999. I expect more players to trigger clauses or make the team who bring that up nominally and probably slightly exceed.
Let's assume we extend Tanaka at his current rate. This leaves us with $120 mil committed with a cap of $197. We'd have to replace the production of CC, Clippard and Pineda on the pitching side. On the offensive side, Carter and Holliday will be the only ones who's contracts expire. Best case scenario is that some of our pitchers step up and we would need to sign only two starters and no relievers. I honestly think we wouldn't need Clippard come 2018. Even if we nab Darvish and Arrieta, we'd still have another $20 is million before we hit the cap. The likelihood that we'd land both is low, but the possibility of having Tanaka and Darvish atop our rotation I think is pretty good.