When I’m watching baseball, I’m almost always also on Twitter. Twitter has made watching a game by yourself in your home a social experience, and so now, it’s almost like watching a bunch of games with a bunch of other people. It’s great. Twitter is really an amazing creation, considering that the idea is basically mass text messaging.
Among the people I follow on Twitter is Keith Law. Keith is a prolific tweeter, and he interacts with his massive audience pretty much every night. An ongoing point of this conversation between Law and his followers is a derision of the intentional walk. Seemingly every night, someone will send Law an example of a manager putting a batter on, followed by the guy behind the IBB’d hitter launching a bases clearing extra base hit, scoring everyone including the guy who just got walked. Or the pitcher, now without the safety net of having a base open, will end up walking the next guy unintentionally, occasionally forcing in a run without ever forcing the opponent to swing the bat.
Just based on the data that shows up in my Twitter feed on a nightly basis, it feels like the average hitter bats .950 and slugs 2.500 after the guy in front of him gets walked intentionally. And, you frequently hear announcers talk about the disrespect the IBB is showing to the on-deck hitter, and how that might motivate them to prove the opposing manager wrong. All of this talk led me to realize that I actually had no idea what really happened after an intentional walk was issued, but I wanted to find out if the narrative held up to the light of data.
So, as is my usual approach now, I asked Jeff Zimmerman to run a complicated query for me, and now I’m going to take credit for his hard work. Jeff was kind enough to extract the play-by-play data following an IBB, and then removed all of the situations where the next batter was a pitcher, since I don’t think too many people have problems with an intentional walk that forces a pitcher to swing the bat. What we really want to know is how often an intentional walk to get to a worse hitter, or to gain the platoon advantage, ends up working out.
The answer? More often than you might think.
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