NFL rule changes include players now being able to wear No. 0, and tripping penalties being personal fouls - Dawgs By Nature
NFL jerseys: Which 49ers player should wear No. 0
NFL jersey number updates: Tracking which NFL players wear No. 0 - ESPN
49ers news: Jason Verrett is switching his jersey number from No. 22 to No. 2 - Niners Nation
NFL San Francisco 49ers Nike Vapor Untouchable (Jerry Rice) Men's Limited Football Jersey.
Niners Nation, a San Francisco 49ers community
Cowboys Doomed by Miscues Against 49ers' Defense - The New York Times
Which Players Should Wear No. 0 Jersey After the NFL Announced Players Are Allowed To Use It?
San Francisco 49ers, Philadelphia Eagles: only unbeaten NFL teams