Basketball isn't the only segment leading Under Armour's rapid growth. CEO Kevin Plank raised guidance at the recent investor day, saying the company expected to reach $7.5 billion in annual sales by 2017 led by growth not only in basketball, but in running, women's and youth sportswear sales, Connected Fitness, and more. The new deal with Steph Curry is just one more example of how well Under Armour is executing its growth strategy.