WWE Daniel Bryan / by Justin Merriman

Bryan Keller, 4, of Farrell, PA flexes his muscles with WWE Superstar Daniel Bryan as the professional wrestler visits with patients and their families at Children's Hospital of Pittsburgh of UPMC on Monday afternoon, March 9, 2015. The WWE Superstars and Divas visited the hospital as part of "Conner's Cure," an organization named in honor of Conner Michalek who passed away at age 8 from medulloblastoma, a rare tumor that affects the brain and spinal cord.  "Conner's Cure" provides funds for pediatric brain and spinal cancer research and medical care for children and their families.