Past the defensive ratings, the biggest issues are 1) 2nd base, where we don't really have anyone, and 2) Casas' ABs.
With Casas, I can live with a 115 wRC+, but only if he is ready in April. With 2nd, if we go over the top somewhere else, I could live with a platoon of Romy/Hammy, but it is also the easiest place to grab an upgrade.
I'm starting to warm up to the idea of signing Okamoto.
We have an automatic 1B regardless of Casas' health.
A good backup for 3B if we want to rest Mayer against tough lefties.
If Mayer gets hurt, Oka slides to 3rd. If Story gets hurt, Mayer slides to SS, and Oka to 3rd.
And he should be a good righty bat, which almost has to help.