Arizona Diamondbacks at Chicago Cubs: Final Score & Recap

The Chicago Cubs handled the Arizona Diamondbacks convincingly at Sloan Park on March 5, 2026, rolling to an 8-1 victory that saw the DiamondIQ model's estimate of a home win climb from 54 percent before the first pitch all the way to 100 percent by the final out. Chicago scored in four separate innings, putting up two runs in each of the first, third, and fifth frames while adding a run in the fourth and another in the eighth. Arizona managed just six hits and committed one error, while the Cubs finished clean in the field with 12 hits across their lineup.

The decisive sequence came in the bottom of the third, when Dansby Swanson connected on a home run off Spencer Giesting that swung win probability by 14.4 percent in Chicago's favor, the single largest play of the game by that measure. Arizona briefly answered in the top of the fourth when Pavin Smith went deep against Colin Rea for a 6.9 percent swing, but Pedro Ramirez responded with a single off Kevin Ginkel in the bottom half that pushed probability another 4.7 percent toward the Cubs. Carson Kelly added a home run off Ryan Thompson in the fifth for an additional 5.8 percent swing, steadily extinguishing any path back for Arizona. Ryan Waldschmidt's strikeout against Rea in the second was the Diamondbacks' most damaging moment at the plate, costing their win probability 5.5 percent.

Colin Rea led all pitchers with a WPA of plus-9.4 percent, with Phil Maton and Hoby Milner contributing plus-3.5 and plus-1.0 percent respectively in relief. Among position players, Swanson finished as the top performer at plus-14.4 percent WPA and plus-2.0 RE24, while Cristofer Torin posted plus-8.7 percent WPA and Pedro Ramirez contributed plus-8.2 percent WPA on the night. The DiamondIQ model leans toward games of this profile as ones where early multi-run support and consistent bullpen execution leave the trailing team with little room to maneuver, which is precisely how this one unfolded.