Is There a Good Time to Face the Dodgers in October?
In the midst of what will go down as a disappointing season for the Phillies, an interesting detail about the front office’s thinking appeared. This morsel snuck into a Ken Rosenthal article: “…once the Phillies began to slump, their front office’s thinking was, ‘We don’t want to go all-out for the chance to play in the wild-card game and then face the Dodgers in the Division Series.’”
There are separate discussions to be had about whether that’s a defeatist attitude, or even whether the Phillies could have done more at the deadline. That’s for someone else to decide, though. What this statement got me, among others, wondering was: wait, would you actually rather play the Dodgers in a seven-game series than a five-game one? No one would argue that the Phillies are as good as the Dodgers — they’d clearly be underdogs no matter what. But does the extra chance of avoiding the juggernaut make up for the fact that you’re more likely to win in a shorter series?
To investigate this problem, I worked out a simplistic playoff win probability model. For each team, I took their projected rest-of-season runs scored. Then I projected a playoff rotation and how many innings each pitcher would pitch per game. Using those starters’ projected runs allowed per inning and adding in the projected runs allowed per inning by the bullpen (an admittedly inexact science that involves stripping out starters’ projections from the team’s total runs allowed projections), I was able to produce a runs allowed forecast for each starter on each team. Let’s take a look at the Phillies, for example:
| Pitcher | IP/Start | Team Runs Allowed | Team Runs Scored |
|---|---|---|---|
| Aaron Nola | 6.33 | 4.58 | 4.98 |
| Vince Velasquez | 5.33 | 5.11 | 4.98 |
| Drew Smyly | 5.67 | 5.24 | 4.98 |
| Zach Eflin | 6 | 5.4 | 4.98 |
