Sorry i didn't see this thread sooner...yes, the cardinals are one of a few teams in the league that draw over 3 million fans each year...tickets to a game are very hard to come by if you wait until the week of the game you wish to go to...
Factoid, if you are wondering why St. Louis draws so well, it is because of KMOX radio which reaches Kansas, Nebraska, Tenn, Kty, Arkansas and as far away as the Carolinas and the Dakotas...cities that do not have a team tend to be cardinal fans.
--daniel