Baseball quirks (not really traditions):
1) Big Poopi step out of the batters box, re-velcro his gloves, and spit on his hands in between EVERY pitch.
2) Jim Leyritz the way he use to twirl his bat like a baton in between pitches.
3) "Enter Sandman" when Mariano Rivera comes out of the pen
4) (Okay this is a tradition) 7th inning stretch singing "take me out to the ballgame"
NCAAF:
A core of 6 of us tailgate for every UCONN football home game and usually each invite a person. We always get there when the gates for the parking lots open. Not as big as other football schools, but still fun.
Football:
1) Once a year we go to a Patriots home game and tailgate. I go with friends who are Patriots fans (I'm not) and I find a way to tease the team. This past year I wore a shirt which only read "18-1" in big font
2) Steelers Terrible Towels
3) The cheerleaders!
Basketball:
Jason Kidd blowing a kiss with every free throw
Hockey:
Playoff beard
Soccer:
shirt over your head when you score a goal