At just 29 years old, Frank Ragnow’s retirement announcement stunned many, but for those closest to the Detroit Lions, the surprise wasn’t that he retired -- it was that his battered body had somehow allowed him to perform at an elite level for so long.

While they may have been internally preparing for the move all offseason, the Detroit Lions were still dealt a blow

Detroit Lions center Frank Ragnow is retiring after seven seasons in the NFL. Ragnow, 29, announced his decision in an Instagram post Monday, and he cited his future health as the primary reason.