By Nick Selbe Barber was found dead in his apartment on Wednesday in Frisco, Texas. Former Cowboys and Bears running back Marion Barber was found dead in his apartment by police in Frisco, Texas, the team announced Wednesday. He was 38 years old. The cause of death is currently unknown. News of Barber’s death was initially reported by Clarence E. Hill, Jr. of the Fort Worth Star-Telegram. The Cowboys released a statement sending condolences to Barber’s friends and family. “We are heartbroken by the tragic death of Marion Barber III,” the statement read. “Marion was an old-school, hard-nosed fo…