"The one thing about the rehab, as a player and a manager, you want it to happen fast. It does not happen fast," manager Terry Collins said. "There's a process involved, and we stand by our medical people, who we truly believe do a good job of managing."
Collins said Wright wouldn't be cleared to do full baseball activities until he can run the bases and run in a straight line with some speed.
Wright is batting .309 with 16 home runs and 54 RBIs this season.
"David said last week this could become a chronic problem if it's not taken care of and done right," Collins said. "Is he getting better? Yes. Is he getting closer? Yes. What's the timetable? No one knows."
Josh Vitale is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.