William is sharing his weight loss journey on My 600-lb Life, having gone from an athletic sportsman to weighing over 600lbs. A knee injury derailed his career but now he’s determined to fight back. “It’s heartbreaking to look at it,” the My 600-lb Life star’s mother says as the trailer shows William eating two pizzas with chips laid on top. But he says enough is enough, and set himself a goal of losing 70lbs. William joins My 600-lb LifeWilliam joins My 600-lb Life hoping to turn his life around. Dr. Now sets the TLC star a goal of 70lbs to lose so he can be approved for weight loss surgery a…