Long list:
Let's start with football (soccer)
First of all:
PUMAShttp://www.able2know.com/forums/viewtopic.php?t=40817&highlight=
also:
Osasuna (Spain), as most Mexicans do. Strongly prefer Barcelona over Real Madrid.
Milan (Serie A Italy)
Modena (Serie B Italy)
Let's move to baseball (allegiance may change in MLB, Yankee hatred remains forever):
Washington Nationals (National League: bought my cap not long ago)
Baltimore Orioles (American League: dissapointed after a good start).
Tigres (Mexican summer league: diehard fan until they moved to Puebla, feel like a betrayed lover, but can't stop liking them)
Tomateros de Culiacán (Mexican winter league)
Tubingen 2 (Birksliga, Baden-Wurttenberg: can't help it; my son plays there)
Now American football:
Green Bay Packers (NFL; come rain, come blizzards, come Brett Favre's old age: I was a Packer fan even when David Whitehurst was QB)
Pumas CU (ONEFA; Mexican college league)
(Don't give a damn about US College football)
Basketball:
Chicago Bulls (NBA)
Hockey:
St. Louis Blues (NHL) -but I hardly follow-