The Detroit Tigers handed the Boston Red Sox a 4-1 defeat at Fenway Park on April 18, 2026, a game that swung decisively in the fourth inning and never returned to Boston's hands. The DiamondIQ model entered the night giving the home side a 42 percent chance of winning, a figure that eroded steadily before reaching zero by the final out. Detroit broke through in the top of the fourth against Brayan Bello when Kevin McGonigle singled to extend the inning, then Kerry Carpenter delivered the decisive blow with a home run that added 10.9 percent to Detroit's win probability and gave the Tigers a lead they would not relinquish. That three-run fourth accounted for the bulk of Detroit's four-run total and defined the game's trajectory.
Boston's best chance to respond came and went in the fifth inning in the span of two batters. Ceddanne Rafaela kept the Red Sox alive with a double off Tarik Skubal worth plus 11.0 percent in win probability, briefly narrowing the gap. But Connor Wong immediately followed by grounding into a double play, a swing of negative 12.0 percent that effectively ended Boston's realistic path to a comeback. A sixth-inning groundout by Wilyer Abreu off Skubal further drained the Red Sox's remaining probability, costing another 7.7 percent.
Tarik Skubal was the game's dominant force, finishing as the top pitcher by WPA at plus 19.1 percent, neutralizing Boston's lineup even when runners reached. Tyler Holton added 11.5 percent from the bullpen, and Jovani Morán contributed 6.6 percent to seal the outcome. Offensively, Kerry Carpenter led Detroit with a WPA of plus 10.2 percent and an RE24 of plus 2.0, while Rafaela's double made him Boston's lone bright spot at plus 11.7 percent WPA on the evening, with Roman Anthony also showing plus 6.7 percent in a losing effort.
Analysis generated by DiamondIQ's model.