Adam Arnold is an industrial technician who first competed in American Ninja Warrior 6 in St. Louis where he cleared qualifying, but failed the Rumbling Dice in the city finals and did not advance to Las Vegas.
For American Ninja Warrior 7 he quit his job to go on the walk on line for Orlando after failing to be a walk on in Kansas City. His run in qualifying was digested but it was shown that he finished the course placing 9th. He finished the finals course as well placing 2nd. In the National finals he failed the Propeller Bar on Stage 1.
Adam returned to compete in Indianapolis in American Ninja Warrior 8 where he cleared the qualifying course placing 3rd, and in the city finals, he finished with the fastest time of the night. In the national finals, his run on Stage 1 was digested but it was shown that he failed the Giant Log Grip.
Adam returned in American Ninja Warrior 9 again in Kansas City, where he shockingly went out on only the 3rd obstacle, Broken Pipes, in qualifying.