The postponement came after Bieber reported soreness following a bullpen session with the Akron RubberDucks. While any disruption to a pitcher’s recovery timeline naturally causes concern, the Guardians organization appears to be taking a measured approach.

Ace right-hander Shane Bieber, returning from Tommy John surgery, seemed to be on the path back to the major leagues. But that path has hit a snag. Bieber, 30, was supposed to make his second rehab start on Friday for the Double-A Akron Rubberducks.