Weurtz: I'm sure the quote was what Weurt said. My point about baseball knowledge was about the conclusion Muskat drew, that Weurtz's confidence really made a difference in the game. We don't know that, and have no evidence to support such a claim besides the conventional wisdom of baseball. CERA: You say that some both describe it as insignificant and use it to show that it doesn't matter when it evens out. I say that these two things are the same argument. It is insignificant because, when yhou have a large sample size, like Barrett's career as a Cub, and remove the variables of different pitchers, opponents, etc., CERA tends to even out, showing that catchers do not have a significant impact on their pitchers beyond their visible fielding abilities, making it the stat (and the notion that good catchers make pitchers better) insignificant. Catcher's defense: You say that Soto's ability to block the slider saved the game. Let's assume that if Barrett was here, he would have let one of those sliders through, allowing a run to score. In reality, the chances that this would happen would only be slightly higher with Barrett catching than with Soto, but for the sake of the exercise, we'll pretend it was a foregone conclusion. According to your logic, that means that Barrett would have been responsible for the loss. In reality, though, Barrett was responsible for a PB. In most circumstances, a runner wouldn't have scored. So some of the credit for the loss has to go to Eyre and Weurtz, who walked a collective 3 batters that inning, creating the situation that allowed Barrett's PB to bring in the tieing run. So those three are responsible for the loss. But wait. If the Cubs had a bigger lead, they wouldn't have needed Barrett to block the ball and Weurtz and Eyre not to give up 3 BBs. So some of the blame rests with Marquis, who gave up 6 ER in 4 IP, for creating a situation in which the Cubs had only a 1 run lead, desite having scored 7 times. On the other hand, if some of the balls that were hit in play were fielded for outs, he wouldn't have given up those runs, so some of the credit goes to all of the fielders. And if the team hadn't made as many outs per hit while batting, they would have scored more runs too, so some of the credit for creating the situation goes to every batter who made an out. The credit doesn't get dispersed completely evenly, of course. But as you can see, there is no such thing as one play or player winning or losing the game on their own. The notion that a defensive catcher would have saved the game is misplaced. You need to look at the overall value contributed by each player towards the game to see where the credit goes, not just to one particular play in a sequence. That is the kind of thinking that leads you down the road of clutchiness and defensive positions.