The seventh-inning out that kept the deficit workable
Comebacks usually begin with arithmetic, not fireworks. Arizona was down 4-0 in the seventh when Dennis Santana entered with two outs and the bases loaded. Four pitches later, Seiya Suzuki had flied to center, the inning was over, and all three inherited runners were still sitting on the bases they had taken.
That matters because 4-0 and something larger are entirely different kinds of nights. Santana's job was not to rescue the whole game. It was to keep the score from getting too expensive. He did that, and Arizona was still one good inning away from making Chicago feel the game tilt.
Chicago lost the clean handoff in the eighth
Until then, Chicago had mostly controlled the evening through Clay Holmes, who gave the Cubs 7.0 scoreless innings while allowing two hits and two walks and striking out five over 93 pitches. So the eighth was not a slow leak. It was one late pocket Arizona finally reached.
Daniel Palencia faced six hitters, and the inning changed only after there were already two outs. Gabriel Moreno doubled in one run, Geraldo Perdomo followed with a two-run single, and a 4-0 game became 4-3 on consecutive scoring swings.
There was some plain baseball texture inside it. Palencia threw 17 four-seam fastballs and five sliders in his 22 pitches. The two run-scoring balls in play came on sliders. When a fastball-heavy inning finally asks the secondary pitch to clean things up, it had better be precise. These were not.
Waldschmidt turned a 2-1 slider into the finish
By the ninth, Arizona no longer needed a big inning. It needed one completed thought. Tim Tawa walked, Jose Fernandez entered to run, got to second with two outs, and the tying run was suddenly in scoring position for Ryan Waldschmidt.
Jacob Webb opened Waldschmidt's plate appearance with a called-strike slider, then missed with a fastball and a changeup. On 2-1, he came back with another slider in the zone. Waldschmidt hit it 102.6 mph, drove it 408 feet, and the two-run shot to left ended the game with Arizona on top 5-4.
That is the part hitters live on in games like this: not five chances, just one count that belongs to you for a moment. Waldschmidt got that moment, and he did not leave much room for debate.
The walk-off was the finish, not the whole story
Baseball likes to hand all the credit to the last swing because that is the easy photograph. This one deserves that photograph, but the game had already started bending earlier. Arizona kept a 4-0 hole from deepening, then dragged it down to one run with two-out damage, and only then did Waldschmidt get the count that could end the night.
So yes, the home run will own the highlight. It should. But this comeback was built the old way, one survivable inning at a time, until the final pitch was small enough for one hitter to settle for no argument at all.