Spenser Mestel is a freelance writer who first competed in Kansas City in American Ninja Warrior 7, In qualifying, his run was cut but it was revealed that he completed the course placing 17th.

In the city finals, his run was cut again but it was revealed that he failed the Big Dipper, placing 37th in the city finals overall. He was one of only two competitors in the finals to fail there, with the other being Meagan Martin.

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