Why American sports teams play the national anthem in the first place - Vox
Why do 49ers fans hate the Seahawks? Aren't the Cowboys and Raiders bigger enemies? - Quora
Why do 49ers fans hate the Seahawks? Aren't the Cowboys and Raiders bigger enemies? - Quora
Seahawks rout 49ers in Richard Sherman's return to Seattle
Seattle Seahawks confirm no fans at CenturyLink Field until at least November 19th - Field Gulls
San Francisco 49ers - Wikipedia
2017 Opponent Scouting Report: Week 5, 49ers Defense, No, Not Everyone Retired. I Think. - Stampede Blue
Do Oregon Fans Favor Seattle Seahawks or San Francisco 49ers?
Seahawks and 49ers fans have found a great way to compete – The Denver Post
Why Seahawks vs. 49ers might again be among NFL's best rivalries
A Grip on Sports: Clowney, Wilson help Seahawks answer any questions in overtime win over San Francisco