Muhammad Ali

Even to Prince, the boxing champion known as the "Greatest of All Time" was an icon to be revered.

Just as Jackie Robinson helped integrate sports a generation earlier, Muhammad Ali's courage inspired athletes to risk their careers and stand up for their beliefs. Including a legendary group of football players at the University of Wyoming...

Boxing legend Muhammad Ali is 'very sick,' and his family fears 'The Greatest' may soon 'pass away,' says Ali's brother Rahman Ali. Rahman told a newspaper that the former heavyweight champion is gravely ill and can no longer speak.