Shelby Shelton kept the Spokane (12-8) off the board during his seven innings of work and the Yakima Valley (2-17) beat the Spokane, 1-0.
Shelton struck out none and allowed four walks and five hits.
Mackenzie Olson ended up on the wrong side of the pitching decision, charged with his second loss of the year. He lasted just four innings, walked one, struck out two, and allowed one run.