Lions Pro Bowl center Frank Ragnow announces surprise retirement after 7 seasons

The Detroit Lions offense has taken another significant blow.

Months after losing offensive coordinator Ben Johnson, Pro Bowl center Frank Ragnow announced his abrupt retirement on Monday.

Ragnow, 29, played seven seasons in the NFL, all for the Lions.

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Ragnow posted to social media that he has tried to convince himself he’s feeling well enough to play, but he said he's not.

"I have given this team everything I have and I thought I had more to give...