Imanaga's splitter became the night's governing pitch
The easy version of the Cubs' 6-1 win is the line score for Shota Imanaga: six innings, three hits, one run, no walks, four strikeouts. True enough. It also misses the pitch that kept Miami from ever settling. Imanaga threw 42 splitters in 94 pitches, a 44.7 percent usage rate, and Miami swung at 32 of them and missed 17 times. Three of his four strikeouts ended on swinging splitters. When one pitch shows up that often and still keeps winning that cleanly, hitters stop seeing a full repertoire. They start living inside the same uncomfortable decision.
The strikeouts tell the story in plain baseball language. Heriberto Hernandez swung through a 1-2 splitter in the first. Esteury Ruiz missed a 2-2 splitter below the zone in the second. Brian Navarreto got two straight splitters after an 0-1 count in the third and missed both. The fourth strikeout came on a full-count sweeper in the fifth, which is useful context: Imanaga was not reciting one answer mechanically. He was using the splitter to make everything else play cleaner. Four strikeouts looks modest in a box score. Seventeen splitter whiffs tells you what those at-bats actually felt like.
Crow-Armstrong made two innings hurry
Pete Crow-Armstrong's line was one hit, one walk, one stolen base and two runs. The better description is that he kept two innings from relaxing. In the sixth he walked, stole second, and eventually scored on Ian Happ's walk. That is not decorative baserunning. It changes the size of the inning. Once the runner is already in scoring position, the next plate appearance does not need to be heroic to hurt you.
He repeated it in the seventh with a different route. Crow-Armstrong doubled to right with no outs, moved to third on Seiya Suzuki's flyout to right, and scored on a play recorded as a Blalock wild pitch. Same player, same pressure, different path. Some runners wait for the inning to happen around them. Crow-Armstrong made Miami defend the inning twice, and Chicago collected a run both times. That is the piece of speed the box score tends to flatten. The steal is obvious. The urgency it creates is the real tax.
Busch did the quiet work before the loud swing
Michael Busch was part of the sixth-inning traffic before he became the ninth-inning headline. He walked in the sixth and later scored on Nico Hoerner's single. That is the quieter kind of offense, the kind that keeps an inning moving and stretches a lead without asking for a ball in the gap. Busch reached base twice and scored twice. One of those trips just happened to be much louder than the other.
In the ninth, he turned an 0-1 sweeper into a 427-foot solo homer to right-center. The ball left at 105.6 mph with a 32-degree launch angle, which is a tidy statistical way to describe something that looked finished the moment it was struck. Busch's night works as a small lesson in how these games are really built. The walk mattered. The run mattered. Then the homer arrived and made the whole evening easier to summarize. Box scores like the loud ending. Players like the guy who did both parts.
Chicago won by narrowing the game
The Cubs did not need a complicated formula here. Imanaga kept giving Miami the same stubborn problem with the splitter, Crow-Armstrong kept turning ordinary baserunner moments into active trouble, and Busch supplied the clean punctuation after doing quieter work earlier. That is a sturdy way to win a ballgame. Make the hitter uncomfortable, make the inning speed up on the other side, and the margin starts to look less like a surprise and more like the bill coming due.