
Ochaun Mathis was one of 14 drafted rookies to make the Rams’ initial 53-man roster on Tuesday but he won’t be active for very long. Sean McVay told reporters that Mathis will start the season on injured reserve, which means he’ll miss at least the first four games of the regular season.
In order for a player to be eligible to return from IR, he has to make the 53-man roster first, which is why the Rams kept Mathis instead of putting him directly on IR. Had they placed him on IR before final cuts, he’d have been ruled out for the season.