Bielak and Framber Valdez are competing for the final spot in the rotation, Alyson Footer of MLB.com reports.
EDGE Analysis
Bielak, who has been used mostly as a starter in the minor leagues, was originally thought of as being a possible bullpen member, but he has become a candidate to replace Jose Urquidy (undisclosed) in the rotation. The 24-year-old Bielak, a righty who has no MLB experience, started Saturday's intrasquad game against Valdez. He allowed four runs on six hits and one walk while striking out three over four innings in a 73-pitch effort.