Green Bay, Wis. ? Bob Harlan will delay his retirement as the Green Bay Packers’ chief executive officer because hand-picked successor John Jones is taking a leave for personal reasons.

The Packers said Saturday that Jones is taking an indefinite leave of absence from the team because of “management concerns.”

In a hastily arranged news conference, Packers executive committee member Peter Platten said he could not provide specifics about the nature of the concerns.

“But I will tell you that they did not involve personal conduct or ethical violations,” Platten said.

Jones had open-heart surgery in June 2006, but has appeared to be in good health in recent months. He represented the Packers at NFL meetings in Nashville earlier this week. Jones was not present at the news conference on Saturday.