Beast Games' Jeffrey Allen uses prize money to fight son's rare disorder

As a toddler, Lucas was diagnosed with Creatine Transporter Deficiency, or CTD, a rare genetic mutation that blocks the transport of the natural source of energy from the brain and muscle. Symptoms can include difficulty growing and gaining weight, slowed development of motor skills, intellectual disabilities, autistic behaviors and seizures, according to the National Organization for Rare Disorders. His dad Jeffrey Allen won the first season of “Beast Games” and $10 million.