Lester, Wainwright, and World Series Repeat Starters
One of the points we’ve been hammering home really all postseason long is that starting pitchers tend to perform worse and worse as a game goes on. It’s far from a dramatic effect — a pitcher the third time around shouldn’t be expected to get completely and utterly bombed — but an effect is there, as pitchers make subsequent trips through the order. Starters become less effective, and so it becomes more and more important to put your trust in a fresh bullpen. It stands to reason part of the effect is pitchers getting a little fatigued. It stands to reason another part of the effect is hitters getting multiple looks at a guy. Hitters communicating with one another about what they’ve seen from a guy. The second and third time, the average hitter might be more prepared to punish the guy on the mound.
Let’s assume that it’s true that there’s a benefit to having already seen a guy once in a game. Maybe it’s not, but that would be quite the discovery. It doesn’t take much of a leap, then, to suggest there might be a benefit to having already seen a guy start in a series. Face a pitcher in one plate appearance, and you might be more prepared in the second plate appearance. Face a pitcher in three plate appearances, and you might be more prepared in the fourth through sixth plate appearances. It sounds sensible, meaning this works as a starting point. It doesn’t yet work as a conclusion.




