What I found was this: You can, but the player may drop a bit. and it kind of depends on their WE. If the WE is above 75, and they are a starter, then you should be able to put it at 0 with no loss. Otherwise, I put it at anywhere from 4-8 depending on their WE. (except LP and PE, those can go to 0 pretty much, since 3 is their base number.)