Joyner experienced his childhood along with three siblings in East St. Louis, Illinois. They are Jackie Joyner-Kersee, Angela Joyner, and Debra McNair. His sister Jacqueline is a retired American track and field athlete.
Most noteworthy, Jacqueline ranked among the all-time greatest athletes in the heptathlon as well as the long jump. Citing his career, she won three gold, one silver, and two bronze Olympic medals at four different Olympic Games.
