James Donald Wilson is a gym owner from Cincinnati, Ohio. Known commonly as the Nati Ninja, Wilson runs for his girlfriend/current wife Caitlin, who is diagnosed with Multiple Sclerosis.On ANW 10, Wilson was stated to have competed in his fifth consecutive season, meaning that he started back since ANW 6. Though none of his runs were shown from ANW 6 to 8, it was, however, mentioned that he never made it past the fourth obstacle in qualifying prior to ANW 10.
He first competed in St. Louis in ANW 6 where he made it past the fourth obstacle, but was DQ’d on the Rope Swing Into Cargo Net because his long hair grazed the water.
He returned in American Ninja Warrior 8 in Philadelphia, where he failed the Wall Drop.
Wilson competed in Cleveland, Ohio where he was able to get past the first three obstacles. However, his run ended on the Ring Jump, when he made an unwise attempt to leap to the next ring rather than reach for it.
Wilson returned for his fifth consecutive season in American Ninja Warrior 10, competing in Indianapolis. After five seasons, Wilson had been able to get past the fourth obstacle. His run ended quickly on the Spin Hopper, but his performance was enough for him to place 17th overall and make his first appearance in the city finals.
He returned to compete in his hometown in Cincinnati. Although he was ecstatic as a hometown representative on the course, he once again failed the fourth obstacle, failing the Wingnuts after accidentally kicking the second one.
- Wilson is the second competitor to have a wife who is diagnosed with Multiple Sclerosis, after Lance Pekus.
- During American Ninja Warrior 11's Cincinnati qualifiers, Wilson had Bengals Quarterback Andy Dalton supporting him. Dalton was at the Cincinnati qualifiers supporting many other competitors as well, such as Drew Lachey.