Jim Caldwell will take a leave of absence from his role as Miami Dolphins assistant head coach/quarterbacks coach and serve as a consultant for the 2019 season to address health issues, the team announced Saturday.

No timetable for his absence or details about his health were provided.

"I will be stepping back due to some medical complications that require my full attention," Caldwell said. "I want to thank [owner] Stephen Ross, [general manager] Chris Grier, Coach Flores and the rest of the organization for the support they have given me and my family."

Caldwell, 64, did not coach last year after departing the Lions in 2017. He interviewed for the vacant jobs with the Packers and Jets this past offseason before rookie head coach Brian Flores tabbed Caldwell as one of his top deputies on Feb. 8.

"Our focus is on Jim’s health and supporting him in every way that we can," Flores said. "With his knowledge and experience, Jim has been an invaluable member to our coaching staff and will continue to serve as a sounding board for me throughout the season."

Caldwell has been a head coach in the league for seven seasons -- three with the Colts and four with the Lions -- and took four of those teams to the playoffs, including a 2009 Super Bowl appearance with Indianapolis.