The Nats won Game 1 of their NLDS series against the Cardinals, 3 runs to 2, on a dramatic two-out RBI single by rookie Tyler Moore. But let’s rewind and remember how they got there.
Michael Morse reached on an error. Ian Desmond singled, putting runners on first and second and nobody out.
Danny Espinosa then, inexplicably, bunted. Many of us in Nats town scratched our heads (which were already raw from pulling our hair out in clumps all game). Why the hell would Espinosa bunt? On the radio, Slowes and Jaegler wondered if perhaps Morse had missed a sign–was that a safety squeeze? A suicide squeeze? What the hell was going on?
After the game, Davey Johnson said he had called for a straight sacrifice bunt, figuring it was the best way to win. (Upon hearing this, I’m sure that Bob Brenly, giving small-ball analysis for the TBS television feed, achieved orgasm).
But did it really give the Nats a better chance to win? Let’s look at the numbers. Before the sacrifice bunt, the situation was runners on first and second, nobody out. Looking that situation up in our handy run expectancy matrix , we see that in that situation, the Nats had a run expectancy of 1.556. That is: when you look at all the times that situation has occurred in baseball between 1993 and 2010, the team in that situation scored, on average, 1.556 runs.
After the sacrifice bunt, the situation was runners on second and third, with one out. That drops the Run Expectancy slightly, to 1.447. So, did the sacrifice give the Nats a better chance to win? Strictly speaking, no. But the drop in run expectancy isn’t big enough, really, to get all that upset about it–especially if all you’re trying to do is get one run over and tie the ball game.
Where things really got dicey was after the Kurt Suzuki strikeout. That made it two outs, runners on second and third: a run expectancy of 0.626–a huge drop from 1.447!
That puts Tyler Moore’s pinch-hit RBI single into perspective. When we watched it, it felt deleriously unexpected–that’s because it was.
Incidentally, I wish TV broadcasters kept a little base/out state run expectancy figure off in one corner of their broadcast. It would be an excellent bit of additional information.