How The Cubs Won The NL Wild-Card Game

Jake Arrieta has thrown just 47 pitches in four scoreless innings — including just 10 balls. That’s fast and accurate even by his extraordinary standards: If he maintained this pace, his pitches per inning and percentage of balls thrown would be his lowest of the season. Manager Joe Maddon kept Arrieta to just 84 and 72 pitches in his last two starts to preserve him for this game. It will be interesting to see at what point Maddon considers pulling his ace to preserve him for a likely NLDS appearance, now that the Cubs are up by four runs. The Cubs had the fourth-best bullpen by wins above replacement this year.

Much was made before the game about the Cubs’ tendency to strike out. Chicago’s batters certainly did lead the league in strikeout percentage during the regular season, but the Pittsburgh lineup wasn’t far behind — they tied for 10th in baseball. And in a plate-discipline number that perhaps flew under the radar, the Pirates had the 12th-lowest rate of walks as well. (The Cubs at least ranked third in walk percentage.) That’s another reason it probably shouldn’t have been a surprise that the Pirates’ batters have struggled to control the strike zone against Jake Arrieta so far tonight.

Last week I updated my “Managerial Meddling Index,” a measure of how often managers make in-game moves, compared with their peers in the same league. Tonight’s managers, the Pirates’ Clint Hurdle and the Cubs’ Joe Maddon, are among the majors’ most active managers, ranking fifth and sixth, respectively, in total tactical activity. Both managers are among the most likely to signal for replay reviews: Maddon has initiated 49 challenges, the most in the National League. Maddon is also the most likely to hit and run, the fourth-most-likely to pinch-hit, and the third-most-aggressive when it comes to pulling starters before they face hitters for the third time in a game. (Thus far it hasn’t looked like he’ll need to do it for Arrieta.) Hurdle is the manager most likely to pinch run and insert substitutes on defense, as well as one of the most aggressive infield shifters. But he has a slower hook with his starters, at least in games that aren’t do-or-die. Obviously, many of these moves depend on the personnel at a skipper’s disposal, and the ratings are more descriptive than prescriptive: They can tell us what moves a manager makes, but not whether he’s right to make them. As this game goes deeper, though, know that neither manager will hesitate to start flipping switches if he perceives a potential edge.