Memes cheer, mock 49ers as NFL's last undefeated team

The best memes about the San Francisco 49ers being the last undefeated team in the NFL after the New England Patriots lost.

The best memes about the San Francisco 49ers being the last undefeated team in the NFL after the New England Patriots lost.

With the New England Patriots falling to the Baltimore Ravens on Sunday 37-20, the San Francisco 49ers remain the only undefeated team in the NFL with a perfect 8-0 record. (Can you believe it?)

On social media, 49ers fans celebrated being the sole football team to have not lost a game this season.