The T-shirt it came from, too! Maybe this one too:

http://www.wpxi.com/video/18657437/index.html
Apparently the image of the Lombardi Trophy was too much for the NFL, and they sent a Cease and Desist letter demanding that Dan stop selling them. So, he's complying.
And get this: the NFL would like "an accounting of the shirts he has already sold." Well, I bought 9 of 'em (3 Yes We Did, 5 Yes We Can, and one Steelers Nation) -- and I paid cash for every one of 'em. And since neither the NFL nor Dan knows my last name, I'm keeping mine! In fact, I wore it today
If the NFL thinks it can confiscate my shirt, they're gonna have to pry it off our cold, dead carcass!
