Kaiti Haymaker is an engineering student at Texas A&M. Kaiti, along with her twin sister Cara, are known as the "Twinjas". Though Kaiti started her actual season in American Ninja Warrior 9, she first started competing on Team Ninja Warrior: College Madness, representing her school.
Kaiti served as the female representative for Texas A&M's team on Team Ninja Warrior: College Madness, teamed up with Will Smithee and Collin Hummel. Their team made it to the relay showdown, but were eliminated by MIT.
Kaiti competed in American Ninja Warrior 9, where she was one of only four women to get past the Tick Tock. Kaiti splashed down on the Spinning Bridge, but advanced to the city finals by placing 4th in the top 5 women. In the city finals, Kaiti got past the Spinning Bridge, but fell on the Sky Hooks. Additionally, her teammate, Will Smithee, also competed in the San Antonio finals.
Kaiti returned in American Ninja Warrior 10 along with her sister, Cara. Both Kaiti and her sister failed the Bouncing Spider, when they both didn't get a decent bounce on the trampoline. Unlike last year, Kaiti didn't advance to the city finals.