Under Armour (UA), known for its performance athletic clothing, footwear and accessories, is delivering high performance in its financials. The Baltimore-based firm is firing on all cylinders. Earnings grew 25% to 167% vs. year-ago levels in the latest four quarters. Sales growth accelerated for three straight periods, hitting 36% in Q1. That gain was the largest since a 42% jump in the third quarter of 2011.