“Opus” is a prized song in the career of one of the most prolific artists in electronic music history. But to some, like future NFL Hall of Famer J.J. Watt, it’s just another “where’s the drop?” moment. After hearing Eric Prydz‘s progressive house hit in the Arizona Cardinals’ locker room prior to training camp practice yesterday, the superstar defensive end found himself asking that very question. His teammate, Dennis Gardeck, was in charge of the music and decided to pump some EDM through the speakers to “get the juice back” after returning from a stint on the team’s Physically Unable To Perform list. Watt, of course, isn’t familiar with the classic prolonged builds of Prydz’s music, which lend to a u...