Al Roker has come out fighting following a battle with prostate cancer, but long before he was diagnosed with the disease he was battling another health crisis. The much-loved Today show weatherman once weighed 340lbs and his unhealthy lifestyle threatened to take over. SEE: Al Roker shares inspiring new video and urges fans to get checked amid cancer battleHe famously underwent gastric surgery and shed an incredible 100lbs and while he has been open about his weight loss, one of the main