Under Armour: Too Big for its Shirt?

It's amazing how many of the world's most successful entrepreneurs quickly forget what made them famous. The latest example is Kevin Plank, CEO of Under Armour. What made Under Armour famous? It wasn't a Super Bowl ad. It wasn't a massive marketing campaign. It wasn't ego or hype. What made Under Armour famous was "performance apparel" a new category Kevin created and carefully nurtured.