McVay had previously said that everyone on the team was vaccinated. [
www.espn.com]
Rams coach Sean McVay has said that to his knowledge, all but one player on the roster has received the COVID-19 vaccine, and that the player who did not has since gained antibodies. (Note: Garrett was the exception).
As a vaccinated player Havs would have been activated if he tested negative twice, 24 hrs apart. Having gone 10 days only means that his time on the list expired before he met that negative test criteria.
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