Posted by ozomatli on 10/13/2019 6:52:00 PM (view original):
My point is more the opposite — a player’s performance so far has no bearing on how well he will do for the rest of the season, so you shouldn’t dump anyone unless you realize you messed up in your initial assessment of player value and find someone cheaper who is actually also better.
This is a bit simplistic. Sometimes their production tells you something - maybe they aren't suited to your park, or the types of pitchers that are frequent in the league. In that case, it may be time to look for someone more suitable, even if they aren't better overall statistically.