Yankees general manager Brian Cashman made the announcement before Thursday night's game against the Arizona Diamondbacks. Jeter originally dislocated the ankle in Game 1 of the AL Championship Series in October.
"We have to back off and let that heal," Cashman said of the small crack in the bone. "This is obviously a setback. We are looking at, in terms of speculating on when Derek might be back with us, you are looking at some point after the All-Star break."
Cashman said Jeter will not need another surgery. Jeter's surgeon, Dr. Robert Anderson, who diagnosed the shortstop in Charlotte, N.C., on Thursday, told Cashman that "95 percent" of the people who have this injury come back from it fine.
Cashman said the crack will take from four to eight weeks to heal. Jeter, who turns 39 in June, will then need close to a full spring training before he will be ready to play in a major league game.
Originally, the Yankees were optimistic that Jeter would be ready for Opening Day, but his rehabilitation has been marred by setbacks. Jeter took this past weekend off, and the Yankees cut the amount of groundballs he was fielding to try and limit the impact on the ankle. On Wednesday, he went for the previously unscheduled trip to Charlotte.
"He is obviously the toughest one we have ever had," Cashman said. "You know when Derek Jeter continues to have issues that don't go away, then it means more than just your typical something, I guess. That is what led to the follow-up."
Cashman said he is satisfied with Eduardo Nunez as his primary shortstop and Jayson Nix as the backup in Jeter's absence. Nunez, who has struggled in his career defensively, has yet to make an error this season and entered Thursday hitting .240 with a .603 OPS.
"I'm happy with Nix and Nunez, but I would be happier with Derek," Cashman said.
Next week, Jeter will return to Charlotte for further evaluation from Dr. Anderson. Cashman said Jeter will address the media during the Yankees' next homestand, which starts a week from Friday.
"[He is handling] it like a pro," Cashman said. "He said, 'I will see you in four to six weeks.' He will never let anybody see any area of weakness or problem. His attitude is, 'You are going to see me sooner than later.' "