Bielak will draw a spot start Friday against the Diamondbacks, Chandler Rome of the Houston Chronicle reports.

EDGE Analysis

The Astros had to scratch Framber Valdez (finger) from Thursday's start, so the team is shuffling its rotation as a result. Bielak has pitched exclusively out of the bullpen to this point in the season, though he has completed three innings in each of his last two outings. Even so, it's unlikely he'll be able to work deep enough into the contest to qualify for a win.