The Memphis Grizzlies have granted Lionel Hollins permission to speak with other teams about head coaching opportunities after a series of discussions on a long-term deal failed to result in an agreement, league sources told CBSSports.com on Sunday.

Hollins, who coached the Grizzlies to a 56-win regular season and a trip to the Western Conference finals, has a contract that expires June 30. He met with members of the Grizzlies' front office on Thursday in what were described as "positive discussions," according to one person briefed on the matter. The dialogue has continued with Hollins' agent, Warren LeGarie, for the past few days.

It has been widely known in league circles for months that Hollins and the Grizzlies' new ownership group and front office do not see eye-to-eye in key philosophical areas. Given that philosophical gap, and the belief within the organization that lead assistant Dave Joerger is ready to be promoted to head coach, the team on Sunday granted permission for Hollins to explore other openings.

The Nets have had Hollins on their radar for some time and are virtually certain to reach out to him, league sources said. The Clippers also are believed to be interested in speaking with Hollins. Though one person familiar with the discussions between Hollins and the Grizzlies said, "The door's not closed," few in the coaching industry believe Hollins will be available for long.

Joerger interviewed for head coaching positions in Portland and Charlotte last summer and is regarded as a rising star in the assistant coaching ranks. He ran the Grizzlies' defense under Hollins and is viewed in league circles as a defensive guru in the mold of Tom Thibodeau and Erik Spoelstra -- though less uptight than both.