Almost 70,000 gamers are set to crowd Los Angeles Convention Center for the annual E3 expo, a highlight on the video game calendar. Some of the top attractions are esports, with competitions throughout the week attracting fans in droves. Inside an 8,000-square-foot state-of-the-art esports training facility in Santa Monica, California, the five players who compete in "League of Legends" for Team Liquid push their bodies to the limit. "I play eight-to-12 hours a day, not including our games on the weekends," Jake Puchero tells me over the phone. It takes a lot of mental focus and physical stamina." Puchero, better known by his in-game name "Xmithie," is a 28-year-old professional "League of Legends" player for Team Liquid. For those not following esports, "League of Legends" is an online multiplayer game that pits two teams of five players against each other in an online battle arena, and it's one of the most popular sporting events on the planet. More people now watch the League of ...