Don't follow any team all that close, but used to live in Baltimore and so their professional teams are sentimental favorites:

Baltimore Ravens ... Pro Football
Baltimore Orioles ... Pro Baseball

And, with Peoria so close to where I live, I kinda cheer for the local teams as well ...

Peoria Pirates ... AF2 (Arena) Football
Peoria Rivermen ... EHCL Hockey
Peoria Chiefs ... AA Baseball Team