DETROIT -- Four-time Pro Bowl center Frank Ragnow has failed his physical and will not play for the Lions this season, the team announced Saturday.

Ragnow was planning to come out of retirement, but after reporting to the facility Friday, Detroit's medical team revealed that Ragnow had a Grade 3 hamstring strain that would keep him from playing.

"Frank has always been a team-first guy and is a true warrior," the team said in a statement. "He will forever be a Lion."

Ragnow, 29, announced his retirement in June after seven NFL seasons in which he battled through multiple injuries.

The Lions still hold Ragnow's contractual rights through the 2026 season. Coach Dan Campbell was initially "fired up" about the possibility of Ragnow returning, but his future for 2026 has not been discuss

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