Top 30 San Francisco 49ers Players All-Time
San Francisco 49ers Building Deepest Defense in the NFL, News, Scores, Highlights, Stats, and Rumors
49ers news: Why Patrick Willis should be a lock as first ballot Hall of Famer - Niners Nation
Patrick Willis, American Football Wiki
49ers Mailbag: Is there a weakness in the San Francisco defense?
Linebackers Lead Way For 49ers Into NFC Title Game - CBS Sacramento
49ers have the best defense in football and the numbers back it up
Bears vs. 49ers: Breaking Down Which NFC Powerhouse Has Most Dominant Defense, News, Scores, Highlights, Stats, and Rumors
49ers: San Francisco's top 10 defensive pairings of all time
San Francisco 49ers hand Eagles another loss; Lions stun Cowboys and Bengals end Bills' streak – New York Daily News
Saints vs. 49ers: Patrick Willis and Defensive Killers Who'll Stop New Orleans, News, Scores, Highlights, Stats, and Rumors
49ers Mailbag: Is there a weakness in the San Francisco defense?