WPA “Chart” points to mixed leverage results as Mariners pick up two wins

The Seattle Mariners managed to turn a two-win stretch into a net positive, according to the latest “Chart” breakdown published by Yahoo Sports on August 2, 2026. The note accompanying the analysis frames the wins as progress, but also questions whether the performances were consistently convincing across the entire run.

The “Chart” format leans on win probability added, or WPA, a stat that measures how much a player’s actions change a team’s chances of winning at each moment. In this edition, Andrés Muñoz comes up with a WPA of -0.23, a negative number that suggests his late-leverage outcomes did not help Seattle’s win odds during the specific sequence(s) highlighted in the piece.

By contrast, George Kirby registers a WPA of +0.35 in the same chart. Kirby’s positive mark points to moments where his pitching moved the game in Seattle’s favor, increasing the Mariners’ probability of coming out on top. The contrast between -0.23 from Muñoz and +0.35 from Kirby is the core tension the article’s preview indicates: the back end did not fully match the starter’s momentum.

The “maxxing” style language in the preview underscores that this was less a conventional recap and more a commentary on process, timing, and leverage. In practical terms, that means the story is not simply “who won,” but rather “how,” and whether the win was built with sustained control or through moments that swung the matchup in and out of Seattle’s favor.

WPA also helps explain why a team can feel like it won “just enough” while still showing internal inconsistencies. A pitcher with positive WPA can stabilize the game at key run-prevention moments, while a reliever with negative WPA may be involved when the margin tightens and the inning’s consequences expand. Together, those two marks suggest a sequence where Seattle benefited from one side of the pitching staff more than the other.

Even without a full game-by-game breakdown in the available preview, the publication’s decision to spotlight specific WPA numbers indicates that the Mariners’ two wins included identifiable turning points. The questioning line in the preview, about whether the wins were convincing enough, reads like a warning that late-game performance and leverage execution could remain a factor if Seattle wants these wins to translate into longer stretches rather than isolated outcomes.

What to watch next is whether the Mariners can build wins that look less like a trade of good and bad leverage. If Seattle’s starter performance continues to generate positive WPA in high-leverage situations, the team will have a path to steady outcomes, but it will likely need Muñoz (or whomever is tasked with similar roles) to reduce the negative impact in late sequences to make those wins feel more durable.