Antonio Brown Suspended

This seems weird as hell:
Antonio Brown is among three players suspended for "misrepresenting" their vaccination status. One NFL insider reports that Brown was found to have used a fake COVID vaccination card. Brown's agent insists Brown is vaccinated, but he will not appeal the suspension.
Brown's former chef told the Tampa Bay Times in November that Brown had obtained a fake COVID-19 card over the summer before the Buccaneer's training camp started.
Rapoport on Thursday said that Brown did indeed have a fake vaccine card.
https://www.msn.com/en-us/sports/nfl/nf ... cid=msnews
So who's lying? Is Brown vaccinated or not? If he is, indeed, vaccinated, then it would be very easy to prove it by producing the same card they gave the rest of us, so why aren't they challenging the suspension?
Antonio Brown is among three players suspended for "misrepresenting" their vaccination status. One NFL insider reports that Brown was found to have used a fake COVID vaccination card. Brown's agent insists Brown is vaccinated, but he will not appeal the suspension.
Brown's former chef told the Tampa Bay Times in November that Brown had obtained a fake COVID-19 card over the summer before the Buccaneer's training camp started.
Rapoport on Thursday said that Brown did indeed have a fake vaccine card.
https://www.msn.com/en-us/sports/nfl/nf ... cid=msnews
So who's lying? Is Brown vaccinated or not? If he is, indeed, vaccinated, then it would be very easy to prove it by producing the same card they gave the rest of us, so why aren't they challenging the suspension?