Charlie Andrews is a student who attends Massachusetts Institute of Technology (MIT). Andrews majors in math/science at MIT, and has founded the rock-climbing organization there from his childhood experience with best friend and Ninja Warrior Josh Levin.
Though Charlie's started his season in the regular competiton in season 9, Andrews first made his debut in a Ninja Warrior broadcast in Team Ninja Warrior: College Madness, where he represented his school, MIT. His team was composed of him, Tomas Cabrera, and Amelia Becker. Their team was the runner-up in the competition, only being beaten by the University of Wisconsin.
Charlie started his actual season in American Ninja Warrior 9, competing in Los Angeles with childhood friend Josh Levin. He completed the LA qualifying course, placing 18th overall. In the city finals, Andrews put up a sensational run where he completed the city finals course. Childhood friend Josh Levin later joined him in completing the entire course. Andrews placed 3rd overall and was awarded the POM Run of the Night for the Los Angeles finals. Overall, Charlie was one of just nine athletes that completed a city finals course that season. Tragically, between filming sessions for the city finals and national finals in Las Vegas, he suffered a fractured skull injury while training with Josh Levin, and was forced to drop out of the national finals as a result. However, his stellar performance and his elimination being beyond his control earned him the title of "Rookie Of The Year" which Josh Levin had earned the previous year
- Charlie Andrews has the closest loss from a finish in Team Ninja Warrior history, where in a semi-finals heat, he lost against UCLA student James Vaughan by an unbeatable record of just .01 of a second.