Okay, I found it. Haha, and the website is www.bearsstillsuck.com... Hey, it was the First one that popped up in Google.
Go! You Packers Go!
Hail, hail the gang's all here to yell for you,
And keep you going in your winning ways,
Hail, hail the gang's all here to tell you too,
That win or lose, we'll always sing your praises Packers;
Go, you Packers, go and get 'em,
Go, you fighting fools upset 'em,
Smash their line with all your might,
A touchdown, Packers, Fight, Fight, Fight, Fight!
On, you Green and Gold, to glory,
Win this game the same old story,
Fight, you Packers,
Fight, and bring the bacon home to Old Green Bay.
Any football team that was alive in the 20s or 30s had a fight song, so I'd imagine that New York, Pitt, and the rest all have one.