Now, I need to structure the post. Start with the correct name, then mention his nickname, his career highlights, achievements, and legacy. Make sure to highlight his contributions to Nigerian football and the clubs he played for, including the Nigerian national team. Also, mention that he played as a defender and his role in the 1996 Olympics team and the 1998 FIFA World Cup qualifiers.
"Mooky Duke Williams was a true legend—an example of grace, leadership, and dedication on and off the pitch."
Next, I should verify the correct spelling of their name. Francis Muok was a renowned Nigerian footballer, and his full name is Muhammed Francis Duke Williams. So maybe the user combined parts of the names incorrectly. The correct full name is Francis Muhammed Duke Williams, often known as Francis Muok or Mooky Duke Williams. That makes sense. The user might have misspelled the name as "Mooky" instead of "Muok."
Francis Muok tragically passed away in 2009 at the age of 42. He remains a beloved figure in Nigerian football, remembered for his discipline, technical skills, and contributions to the sport’s growth in Africa.