Luke Hochevar (5-4, 5.11) will take the ball Monday, making his first start since coming off the disabled list Sept. 3.
Hochevar, who had been sidelined with a right elbow strain since early June, pitched three innings of relief against Minnesota on Tuesday, allowing three runs and five hits, including a home run.
The right-hander is 0-4 with an 11.37 ERA in four starts against the Athletics, but hasn't faced them this season.
Kansas City is 11-23 against teams from the AL West.