Jimmy Choi is a technology consultant and motivational speaker from Bolingbrook, Illinois. Choi was diagnosed with Parkinson's Disease at the age of 27, and has since become an active advocate for the Michael J. Fox Foundation. Choi has gotten co-host Akbar Gbaja-Biamila to advocate for Team Fox, which raises awareness for research on Parkinson's.
Choi returned in American Ninja Warrior 10 where he once again made it to the third obstacle. Choi was moving at a good pace, but couldn't finish the Wheel Flip in qualifying where he lost his grip at the dismount.
After American Ninja Warrior 10, Jimmy's daughter, Karina Choi, later competed on American Ninja Warrior Junior. It was revealed there that Karina was in fact, the source of motivation for Choi to run American Ninja Warrior.