The Baltimore Ravens, undeniably, had phenomenally bad luck on the health front during the 2021 season. When you go into the year with all three of your top running backs on the Reserve/Injured List, I think that’s fair to say. But it didn’t even come close to stopping there, as you likely know.
They also lost, among others, the majority of their starting secondary over the course of the season, and that included All-Pro cornerback Marcus Peters, who actually tore his ACL just before the regular season even started, resulting in them playing the entire season without him.