Israel Alvarez is 13 years old and an eighth-grader at Sacajawea, and like a lot of young teens a big part of his life is sports – football, wrestling, soccer. And boxing. He’s been at it for seven years, and at the end of the month he’s off to Independence, Mo., for the National Silver Gloves, the third time he’s qualified for that tournament. He’s not just an enthusiastic advocate for the sport – citing lessons he’s learned about humility, sportsmanship and confidence – but a salesman.