It has already been established by Doc Roberts that left field, first base and catcher will be manned by a platoon. Well, actually, catcher is not so much of a platoon but rather a way to keep Barnes from being overworked, so Russ Martin will catch about 3 days a week or something thereabouts.
Since Right-Handers make up about 70% of the pitchers, that means that at 1B, Max Muncy will play about 70% of the time and he can also fill-in for Justin Turner at 3B, like on Sunday, so Max will likely get close to 500 at-bats and David Freese will get plenty of rest.