Sean Noble is a rock climber and scuba diver who competed in the Northwest Qualifying Course in American Ninja Warrior 4 and he managed to get as far as the Soritatsu Kabe, but he couldn't scale it, however his time past the Pipe Slider was enough to place 27th place. In the Semi-Finals Noble performed much better and he placed 3rd in the Semi-Finals. On the Las Vegas Course Noble cleared the First Stage, but in the Second Stage he struggled on the Unstable Bridge. Noble transitioned from the first to the second board in an unorthodox way. He grabbed the back of the second board and had to fix his grip, and though he fixed this problem he misjudged his dismount from the second board and failed.