Cowboys-49ers rivalry is undergoing a renaissance - ESPN
San Francisco 49ers - Wikipedia
The Seahawks-49ers Rivalry Is Back, and the NFL Is Better Off for It - The Ringer
San Francisco 49ers - Wikipedia
49ers-Seahawks rivalry isn't what the NFL hoped, but it's enough - Niners Nation
San Francisco 49ers - Wikipedia
49ers–Seahawks rivalry - Wikipedia
49ers vs. Rams: Upcoming Game Info & Rivalry History - Ticketmaster Blog
Remember when the 49ers and Seahawks had a rivalry? - Niners Nation
Winners and Losers from 49ers 21, Seahawks 13 - Field Gulls