DETROIT -- Four-time Pro-Bowl center Frank Ragnow is coming out of retirement and returning to the Lions .

He has decided to unretire and return to the Lions because he "loves the game," a source told ESPN's Adam Schefter.

Wednesday was the deadline for Ragnow to come out of retirement and be eligible to play this season, sources added to Schefter. If a player is on a club's reserve-retired list, he must be reinstated before that team's Week 13 game. Detroit hosts NFC North division rival Green Bay on Thursday in its annual Thanksgiving Day appearance.

The Lions announced that Ragnow, 29, has been placed on the exempt/commissioner permission list.

Ragnow's first chance to play for the Lions will come next Thursday against the Dallas Cowboys , although a return that quickly is c

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