Lowrie departs after going 3-for-4 with his first Major League homer on Saturday night. Cora, who has recovered from a sprained right elbow, went immediately into the lineup at shortstop on Mother's Day as Julio Lugo got another breather following a blow to the head in Friday's game against the Twins.
The Red Sox held off a day in activating Sean Casey (strained right hip) so that they had adequate pitching reinforcements for Sunday's game.
For Lowrie, it'll be a chance for him to play every day and sharpen his infield skills at Pawtucket.
"Hopefully I'll be back soon," Lowrie said. "I'll continue to work on what I was working on up here. The biggest thing is going down there and not letting myself fall into a trap of saying I should be up there. It's a matter of showing up every day and getting my work in."
Lowrie said he anticipates playing shortstop about six days a week and perhaps playing second or third once a week.
Red Sox manager Terry Francona said he doesn't know how much more recovery time Lugo might need.
"He got a CT scan during [Saturday's] game, which came back negative," Francona said. "He certainly looks a lot clearer today."
Robert Falkoff is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.