By Daniel Bates Hall of Fame head coach Tony Dungy is tired of the NFL’s broken system when it comes to the league’s hiring practices. Dungy has been involved in the fight for diversity among NFL coaches for over two decades, and has become increasingly frustrated with the lack of black coaches getting an equal opportunity. On Sunday, Dungy published an open letter the National Football League, on how they can improve one of their biggest problems. “To Commissioner Goodell and NFL Owners,” Dungy penned. “The current system for hiring head coaches is broken. It’s not producing good results.” “T…