HOUSTON (AP) — Astros left-hander Wandy Rodriguez will miss his scheduled start Friday at Atlanta because of back spasms.

Houston will move Brett Myers up a day to replace Rodriguez. Astros general manager Ed Wade says it is possible Rodriguez can start on Saturday.

Rodriguez says he isn't too worried about his back and believes he'll be ready for Saturday.

Rodriguez is 1-2 this season with a 3.65 ERA.