Perez makes his first start after recovering from a fracture in the tip of his right elbow. He threw 87 pitches in a Minor League intrasquad game Friday and is expected to be at full strength. He is 7-7 with a 5.24 ERA in 16 starts vs. the A's.
Mengden was on the hook for six runs (five earned) in 5 2/3 innings in a loss against the Angels on Saturday, though he deserved a better fate if not for a poor defensive performance behind him. Mengden struck out five on the day, walking one.