Once a year, the so-called "sea of red" flows into Kansas City.
While Cardinals fans may be confident about their team, they may not be as confident about their city.
"Kansas City has improved its stock greatly over the years," admitted Cardinals fan Corey O'Brien.
With the streetcar, the jazz scene, new apartments popping up everywhere and of course the barbecue, The Huffington Post recently named Kansas City as "the place to be" in all of America.
St. Louis didn't make the list.
"So now not only are we thinking it but other people across the country are also saying the same thing that we've known for many years now," said Toni Alexander of Visit KC.
Kansas City is also safer.
The FBI's 2014 Uniform Crime Report, ranked St. Louis as the murder capital of the country. Kansas City ranked much lower, at 26th on the FBI's list of most dangerous cities.
Another recent study from Wallethub says Kansas city is growing faster than St. Louis as well.
"Looking around here it seems super nice," said Cardinals fan Reed Raibley while visiting The Plaza.
With great Italian food on The Hill, the Gateway Arch, and the new Ballpark Village, St. Louis features plenty of attractions as well.
But with Kansas City rolling along, St. Louis may need to pick up its game off the field.
Justin Wilfon can be reached at firstname.lastname@example.org.