‘Ultimate dad’ Jon Stewart stuns fans by completing American Ninja Warrior course at age 56
American Ninja Warrior legend Jon Stewart broke his OWN record yesterday to become the oldest man to complete one of the competition’s fabled qualifying courses. The 56-year-old construction manager and rock climber came 13th in the Dallas qualifiers to move on to the City Finals, completing the course in 5:43.61 as his thrilled family looked on.