There are two issues to consider:
- Do players (pitchers and/or batters) behave differently based on who is on deck?
- Is the overall impact better or worse?
In
The Book, we looked at this topic. Luckily for you, it was excerpted a few years back at
The Hardball Times (please read that). The first takeaway is that yes, definitely the players respond differently. And really, when you are talking about human beings in different situations, the expectation is that they should respond differently. After all, they are not automatons, are they? And they respond on the surface as you'd expect: the pitcher is avoiding the unprotected batter, which results in more walks (and more strikeouts).
So, score a big one for conventional wisdom.
But, even though there is a different response pattern by the players involved, that does not by itself mean that it favors one side or the other. Indeed, the result of our study shows that when it comes to putting the ball in play, there was no significant impact.
So, score a wake-up call for conventional wisdom