The San Francisco 49ers have a weapon in Christian McCaffrey, and Trent Williams is getting OPOY vibes from the running back.

In a training camp that has seemed to feature a new injury almost every day for the San Francisco 49ers, the one positive on the injury front has been the health of Christian McCaffrey. After missing almost all of last season with injuries to his Achilles tendon and knee,

The 49ers have committed to Brock Purdy with a big extension. But the key to that deal is the guy standing behind him in the backfield.