The NFL is looking into possible protocol violations by Kendrick Bourne one day after the San Francisco 49ers wide receiver tested positive for COVID-19.

It's standard procedure for the league to look into all positive tests at team facilities, but the NFL is investigating whether Bourne has been wearing his protective face covering properly and frequently enough.

If Bourne is found to have not complied with protocols, the 49ers would be subject to league discipline, including a fine.