Detroit Lions center Frank Ragnow, who was key to coach Dan Campbell’s revival of the team, announced his retirement from the NFL after seven seasons.

Lions center Frank Ragnow, a four-time Pro Bowl selection, announced his retirement on social media Monday.

The Lions Super Bowl odds were unchanged after All-Pro center Frank Ragnow retired.

DETROIT (AP) — Detroit center Frank Ragnow, a four-time Pro Bowl selection who was key to coach Dan Campbell's Lions revival, announced his retirement from the NFL on Monday after seven seasons.

Ragnow, 29, has announced his retirement from the NFL after seven seasons.

Detroit Lions Pro Bowl center Frank Ragnow, who the team selected with the 20th pick in the NFL Draft, announced his sudden retirement on Monday.

Center Frank Ragnow's retirement is another big blow to Lions' Super Bowl dreams Videos cannot play due to a network issue. Please check your Internet connection and try again.

DETROIT — Detroit center Frank Ragnow, a four-time Pro Bowl selection who was key to coach Dan Campbell's Lions revival, announced his retirement from the NFL on Monday after seven seasons ...

DETROIT — Detroit center Frank Ragnow, a four-time Pro Bowl selection who was key to coach Dan Campbell's Lions revival, announced his retirement from the NFL on Monday after seven seasons ...