Editing Arizona Cardinals (section)

==== San Francisco 49ers ====
{{Main|49ers–Cardinals rivalry}} Though they first met in 1951 and would meet occasionally until 2000, this would not become a full-fledged rivalry until both teams were placed in the NFC West division in 2002.<ref name="u551">{{cite web | title=When the NFL added two divisions -- and weakened the AFC West | website=NBC Sports | date=2014-05-22 | url=https://www.nbcsports.com/nfl/profootballtalk/rumor-mill/news/when-the-nfl-added-two-divisions-and-weakened-the-afc-west | access-date=2024-08-19}}</ref> While a close rivalry, it is often lopsided on both ends. After the 49ers won nine of ten meetings between 2009 and 2013, the Cardinals won eight straight meetings between 2014 and 2018. The [[San Francisco 49ers|49ers]] lead the series 34–29.<ref>{{Cite web |title=All Matchups, Chicago/St. Louis/Phoenix/Arizona Cardinals vs. San Francisco 49ers |url=https://www.pro-football-reference.com/boxscores/game_query.cgi?tm1=crd&tm2=sfo&yr=all |access-date=2024-07-31 |website=[[Pro Football Reference]] |language=en}}</ref>

The two teams have yet to meet in the playoffs.