You can rely on certain players to demonstrate the value of chemistry---or at least addition by subtraction. Pierzynski is not a great case from whom to make generalizations. But I'm sure you can substitute other names to build an argument from the sum of anecdotes. Here's a longish-but-telling passage:
But the Red Sox couldn't hit, and Pierzynski at least represented an opportunity for some offense. Wednesday, it was deemed that dynamic wasn't worth keeping him around. Prior to the Sox' win, a group of about six or so players gathered over by where Pierzynski's locker used to be, including a few position players. Later, one of the participants revealed it was the first time this year that he had hung out over in the corner, where the lockers of Ross, Jake Peavy and Jon Lester also resided. Listening to voices throughout the room, it was clear the catcher's exit had opened previously closed doors in that room. While some murmurs of these issues had circulated throughout the season (surfacing a bit in an article written by the Herald's John Tomase), the Red Sox players were trying to put on a good face in regard to Pierzynski's presence all the way up until he was designated for assignment. But after the team's latest turnover, the time had come to take stock of what was an experience unlike something many veterans had ever dealt with. It's over. But, judging by voices heard Wednesday night, it's probably something that should have never started in the first place.