It had to happen sooner or later, a high school phenomenon turning pro. After all, we’ve seen world class high schoolers in the past. Certainly several WAY back during the early days of track and field when youngsters like Bob Mathias were dominant internationally. Even during what I consider the modern era of the sport – The 1960’s forward, athletes like, Houston McTear, Mary Decker, Dwayne Evans, and Gerry Lindgren among others were among the top world class level athletes. There was simply no professional track for them to transition into. More recently, however, we’ve seen Allyson Felix emerge as an international threat while in high school. She made the…