The Lions placed Ragnow (hamstring) on the reserve/retired list Monday, Dave Birkett of the Detroit Free Press reports.
Ragnow came out retirement Wednesday in an attempt to bolster the Lions' offensive line, but that comeback was short-lived after he failed his physical due to a Grade 3 hamstring strain. He has been placed back on the reserve/retired list, and it remains to be seen whether the 29-year-old will attempt to come out of retirement again going into the 2026 season. Graham Glasgow (knee) will remain as Detroit's starting center while Trystan Colon serves as the backup.