Amid vibrant cheers, hamburgers grilling at tailgate parties, and the swing of marching bands, another season of college football is thrillingly underway. But in the background, like the blue-gray October sky of old, lies a quiet discord that is wrenching the heart of college athletics. For hundreds of athletes in sports like track, baseball, swimming, or wrestling, this season they will be told to stay off the fields of play, don't get on the track, get out of the pool, or stay off the mats — if the students happen to be men, that is. That’s because, despite the pleas...