Week 3 power rankings: 49ers rise after 2-0 start

The San Francisco 49ers enter Week 3 undefeated and riding one of the more efficient starts to a season in recent memory, headlined by an MVP-caliber stretch from Brock Purdy and a defense that's making short work of opponents.

Across the industry, the Niners are trending up — and in more than one case, all the way to the top spot.