"It fit the best for the needs of our guys and where it fits best for the rest of the month," manager Buck Showalter said of what went into the decision.
Kevin Gausman, who will start twice for Triple-A Norfolk, is expected to be added to the roster and pitch the fifth game after the All-Star break, though Showalter wouldn't commit on Saturday.
"We have some options there [with the off-day]," Showalter said. "We have it mapped out through the rest of the month if everything stays."
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, follow her on Facebook and Twitter @britt_ghiroli, and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.