I found a good picture of the Minnesota Swarm's road jerseys. The Swarm, which most of you know, is in the National Lacrosse League. The uniforms sort of jumped out at me when the Swarm played the Buffalo Bandits:
Now, when you consider the pants match as well (stripes down the side), the effect to me was, um, "breathtaking" -- it looked like the Swarm had worn its pajamas to the game.
Feel free to disagree, or name your favorite bad sports uniforms. I was always a big supporter of the Vancouver Canucks' jerseys in that category: