Cal Ripken, Jr.
In 2007, Dunn, along with Andre Agassi, Muhammad Ali, Lance Armstrong, Jeff Gordon, Mia Hamm, Tony Hawk, Andrea Jaeger, Jackie Joyner-Kersee, Mario Lemieux, Alonzo Mourning and Cal Ripken, Jr., founded Athletes for Hope, a charitable organization that helps professional athletes, sports industry professionals and fans get involved in charitable causes.