Not sure.
If they do stay under limits, reportedly they have about $56mill to spend.
Out of that they have to pay Betts, Benintendi, ERod, Workman, Bradley, and all the other arb cases. And then fill out the roster.
Now if they blow past limits in 2019, maybe. But then Mookie is definitely gone forever. Resetting this season keeps them in the very limited Mookie market...