Bielak pitched 2.2 scoreless innings against Arizona on Friday, allowing three hits and two walks while striking out six. He did not factor in the decision.

The right-handed reliever was called into action for a spot start after Framber Valdez (finger) was scratched Thursday. Bielak performed well enough in his first start of the campaign, keeping the Diamondbacks off the scoreboard while racking up six punchouts in just 2.2 frames. He wasn't very efficient -- Bielak needed 55 pitches to retire eight batters -- but none of the hits against him went for extra bases, and he was able to escape a bases-loaded situation in the first inning. He'll likely return to the bullpen but will almost certainly be down a few days given his larger-than-normal workload Friday.