Currently the St. Louis Cardinals do not have a player with the Uniform Number of 45 as of October 2009.
Bryan McCann is number 23 on the Arizona Cardinals.
The Steelers won 27-23 over the Cardinals in Super Bowl XLIII.
Jonathan Cooper is number 61 on the Arizona Cardinals.
Justin Bethel is number 31 on the Arizona Cardinals.
Kenny Demens is number 54 on the Arizona Cardinals.
Kenny Rowe is number 44 on the Arizona Cardinals.
Kevin Minter is number 51 on the Arizona Cardinals.
Lorenzo Alexander is number 97 on the Arizona Cardinals.
Lyle Sendlein is number 63 on the Arizona Cardinals.
Marcus Benard is number 59 on the Arizona Cardinals.
Matt Shaughnessy is number 91 on the Arizona Cardinals.
Michael Floyd is number 15 on the Arizona Cardinals.