Save Your Closer! (Terms and Conditions May Apply)
If you’re looking for a sure sign that a manager is thinking in old-timey baseball cliches instead of playing to win, listen for the words “save situation.” There are tons of reasons not to use your best reliever in a big spot — load management, handedness matchups, heck, maybe he ate some bad sushi last night. “We wanted to hold him for a save situation”? Nope! Bad management alert… or at least, it was until the rules of baseball changed.
Love or hate the automatic runner in extra innings, it’s changed the tactical calculus of baseball significantly. Teams haven’t bunted as much as I predicted, which is fascinating in itself, but today, I’m more interested in which pitchers are doing the extra innings pitching. Before 2020, “saving” a pitcher for a lead was self-defeating, but that isn’t an automatic truth, simply a contextual one. Let’s delve into why that was the case, and why it might not be this year.
To explain how this scenario worked in the past, I’m going to use a hypothetical situation. It’s the bottom of the ninth inning in a tie game, and the visiting team has two options for pitching: Nick Anderson or Aaron Loup. They’ll bring one of the two in for the ninth, the other for the 10th if necessary, and then completely average pitchers for every inning after that.
More specifically, they’ll be bringing in pitchers with the career rate statistics that exactly match Anderson’s and Loup’s. This is an abstraction, so we’re ignoring opposing batters and handedness matchups, which a real-life manager would care about: for this article, we’re only worrying about whether bringing in your closer makes sense with everything else held equal. Here are those result rates:
Outcome | Anderson | Loup |
---|---|---|
BB% | 5.8% | 8.5% |
K% | 42.7% | 21.7% |
Single% | 11.6% | 15.4% |
Double% | 3.8% | 4.6% |
Triple% | 1.0% | 0.6% |
HR% | 2.7% | 1.9% |
Other Out% | 32.4% | 47.3% |
Anderson is clearly better. In fact, over a million simulated innings (every batter receives a random result from each pitcher’s result grid until there are three outs), he allowed 2.80 runs per nine innings, while Loup allowed 3.74 runs. Anderson was better in terms of the percentage of innings holding opponents scoreless, too: 80.3% of his innings were scoreless, as compared to 76% for Loup. Read the rest of this entry »