Western Illinois University Leathernecks. Colonel Rock. WIU is the only non-military institution in the nation with permission from the Department of the Navy to use the United States Marine Corps Official seal and mascot, the Bulldog. Colonel Rock, or Rocky, is the University mascot representing “The Fighting Leathernecks” for all male sports teams. Rocky was named after Ray "Rock" Hanson, a former WIU athletic director and former Marine. Women's teams had been known as Westerwinds.