"The calendar is working against us here," Daniels said. "It's going to be a common sense decision, probably leaning toward not taking a chance with it."
He added: "We'll wait to see what the doctor says and determine the next steps."
Darvish was placed on the 15-day disabled list on Aug. 13 with right elbow inflammation. The right-hander has a 3.06 ERA and 182 strikeouts in 144 1/3 innings.
Jackson Alexander is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.