RICHMOND, Va. (AP) â Ron Rivera opened Washington’s training camp Tuesday by expressing frustration about a lack of vaccinations among players, which has caused the cancer survivor to practice extra caution. Rivera said he believed Washington is now over half the players in camp fully vaccinated. The NFL last week said 80% of players have started the vaccination process and that 27 of 32 teams had at least 70% of players either receive one vaccination shot or both. Washington is not one of them â actually closer to 60% â and it has caused Rivera to take precautions. âIâm truly frustrated,â Rivera said at his camp-opening news conference. âIâm beyond frustrated. One of the reasons I walked in with a mask on is Iâm immune-deficient, so with this new variant, who knows? So when Iâm in a group and the groupâs not vaccinated or thereâs a mixture, I put the mask on, and I do that for health reasons.â