Valdez (calf) will start Friday in Oakland, Greg Rajan of the Houston Chronicle reports.

EDGE Analysis

Valdez had to exit his last outing with a cramp in his left calf, but he got through his normal between-starts bullpen session Wednesday with no issues. The left-hander has posted a 2.76 ERA in 18 starts this season, and his 27.4 percent strikeout rate would be a career best.