Dan Campbell knows things will be different for his Detroit Lions without Pro Bowl center Frank Ragnow, but the head coach has a plan. After seven NFL seasons, Ragnow delivered a bombshell as he announced his retirement at age 29 on social media Monday,

"And the other thing is quite frankly, some of the stuff about contract talk, that’s disrespectful. That’s not what this was ever about. Anyway, love you, Frank. Appreciate you.”

Lions head coach Dan Campbell paid tribute to former center Frank Ragnow after his surprise retirement from the NFL on Monday.