Tom Brady won another Super Bowl. Stephen Curry won an MVP and an NBA title.  Jordan Spieth won the Masters and the U.S. Open. Misty Copeland became the first African-American to become a principal dancer at a major ballet company.  It has been a big year for Under Armour’s most high-profile spokespeople, and the company this week will start to roll out its first major brand campaign featuring all of them. It’s called “Rule Yourself,” and the idea summons Malcolm Gladwell’s theory that it takes 10,000 hours of practice at something to be the best.