Astros Take Game 3 from Aníbal Sánchez and the Nationals 4-1
In a technical sense, Game 3 wasn’t a must-win for the Astros. In a practical sense, the odds of Houston winning four straight games against the Nationals are under 10%. The Astros needed the win, and they got it with a 4-1 victory. For those purists of the game who enjoy pitchers batting, Game 3 of the World Series highlighted one of the big differences in strategy between the American and National Leagues: pitchers as hitters.
Greinke’s Bunt
The first potentially important pitcher plate appearance occurred in the top of the second inning. Zack Greinke came to bat with one out and runners on first and third. Greinke’s season wRC+ of 123 doesn’t really represent his true hitting talent, but his career 60 wRC+ also understates his value in this situation. Greinke got down a successful bunt and advanced the runner to second, but the Astros’ win expectancy went down about five percentage points. If Greinke had done nothing, it would have only gone down a single percentage point more. While a double play would have dropped the win expectancy by about 10 percentage points, a sac fly would have moved the Astros up four percentage points, while a single would have moved them up six.
Greinke’s career wRC+ indicates he isn’t a particularly good hitter, but it’s mostly due to his inability to walk or hit for power. With a .225 lifetime average, he hits a decent number of singles, which is what the Astros needed in this situation. With a runner already on third, moving a single runner to second doesn’t help much when there are two outs. The expected situation is a Greinke out, which drops win expectancy by six. The bunt is only one percentage point so we’re really dealing with the chances of a double play versus the chances of a single. Given the large bump from a single compared to the expected out, versus the small drop from the bunt to a double play, the double play would have to have been much more likely than the single to make bunting the right choice. That isn’t in the case here, particularly with Aníbal Sánchez giving up a bunch of loud contact in the first few innings. George Springer followed the bunt with a groundball out to keep the game at a one-run deficit for the Nationals. Read the rest of this entry »