The Lions know it won’t be easy to replace longtime starting center Frank Ragnow, who announced his retirement earlier this week. Ragnow, the No. 20 overall pick in the 2018 NFL Draft, played his entire seven-year professional career in Detroit,

Center Frank Ragnow on Monday announced his retirement on Instagram after seven seasons, four Pro Bowls, and three second-team All-Pro honors. Ragnow was not been present at the team's OTAs last week, and it appears this is the reason why.

The Detroit Lions lost another star to early retirement. Four-time Pro Bowl center Frank Ragnow announced Monday he's retiring after seven NFL seasons, and he now joins the likes of Hall of Fame running back Barry Sanders and Hall of Fame wide receiver Calvin Johnson as top-tier Lions to walk away from the game early.