Adam Arnold is an industrial technician who first competed in American Ninja Warrior 6.
He first debuted in St. Louis where he cleared qualifying, placing 11th overall, but failed the Rumbling Dice in the city finals and did not advance to Las Vegas. He placed 17th at the end of the night. However, Adam got a wildcard for Vegas, and made it all the way to the Jumping Spider before falling.
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.
During the city finals, he put a fantastic run on the course. He finished the finals course with finesse, placing 2nd. Although he made a major statement as a walk-on competitor in the Orlando finals, his national finals debut was short as 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.
During the city finals, he repeated his finals performance last season, finishing the Indianapolis finals course and doing so with the fastest time of the night. In the national finals, his run on Stage 1 was digested but it was shown that he cleared the Propeller Bar, but later failed the Giant Log Grip.
Adam returned in American Ninja Warrior 9 again in Kansas City, where he shockingly went out on only the third obstacle, Broken Pipes, in qualifying. This made it the first time he didn't clear a qualifying course, let alone the top 30.
He did not receive a call to compete on ANW 10 or 11. He revealed walking on again for American Ninja Warrior 11 in Cincinnati, but was unsuccessful.