2013 NFL Season: Why is the Seahawks/49ers rivalry so fierce? - Quora
Seahawks-49ers rivalry on center stage after dormant stretch - The San Diego Union-Tribune
San Francisco 49ers - Wikipedia
Brock Purdy keeps rolling, makes history with big game for 49ers in win over Seahawks
How 49ers vs. Seahawks Rivalry Became the NFL's Fiercest, News, Scores, Highlights, Stats, and Rumors
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Cardinals vs. Seahawks: Upcoming Game Info & Rivalry History - Ticketmaster Blog
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Seahawks rookie has Pete Carroll praising former 49ers rival Jim Harbaugh
Four Downs: What's Changed Since the 49ers-Seahawks Week 2 Matchup?
What can Seahawks learn from getting 'whooped' by 49ers? Plenty of building still needed - The Athletic
The 49ers and Seahawks are rivals again with Richard Sherman in new uni - Field Gulls
Dak Prescott calls Cowboys' loss vs 49ers 'the most humbling game' he's played