Everyone loves a good "comeback" story — especially when it revolves around sports. PowerBar and ThePostGame partnered to tell the captivating stories of professional athletes who have had to reinvent their game to play their way back to the top, as well as rookie hopefuls who are fundamentally rethinking the way they train to rise up in the pro ranks. Through the course of these dramas, we look at what fan-favorite athletes are doing in the gym and with their nutrition to compete at the highest level.