This is just Chaser's guess, but it opens up discussion on an important question: who are they?
This was interesting:
From @Chasenpucks39: I would say that there will be at least five guys from the core guys that will not be back.
— Tim McKernan (@tmckernan) April 28, 2015
So, Kelly Chase is assuming five core players will not be back next season, right after Tom Stillman on KMOX said that there's not much room for knee-jerk reactions. Personally I don't think moving out a couple core players is knee jerk.