If they traded away Robles?
They highly value Meara, that much is obvious. Louro they also kept, so theoretically they see a future for him.
Robles 2017 Salary: 430K
That difference can get you a quality starter (of course, so does spending on DPs, but whatever). We're playing Moneyball here.
Robles is 33, which is young in goalkeeper years. But if they see Meara as the future, and last year tried to sell Dax when his value was theoretically at his peak... (Ironically, if they waited a year, they probably would have gotten more, since player prices shot up.)