Beats by Dre headphones have a great relationship with athletes, not such a great relationship with athletic leagues. Bose is the latest brand to negotiate a marketing deal that effectively gives the boot to Beats. The contract with the NFL bans them from pre-season practices and training camps, from actual games, and all televised interviews no matter where they are (in the locker room, during a press conference, etc). The NFL is responsible for enforcing the rule.
Previously, Sony entered into a licensing deal with FIFA and basically banned Beats from soccer matches. Both brands have clearly learned their lesson from the Olympics, in which Panasonic had a sponsorship deal and was overshadowed by all of the athletes walking around rocking their free Beats headphones.