"We'll see," Girardi said. "It's day-to-day. I just believe one day he'll say, 'It's back.' But we're not at that day yet."
Posada, who has never been placed on the disabled list during his career, was pulled from an April 8 game against the Royals after four Kansas City stolen bases were attributed to the sore joint. Posada went behind the plate in an emergency role on Sunday against the Red Sox, but was instructed not to attempt to throw out runners, as Boston swiped two uncontested bases.
Posada has been playing catch from varying lengths over the past several days, while attempting to build up strength in his shoulder.
Pete Kerzel is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.