FRISCO, Texas (WKBN) – The Fort Worth Star-Telegram is reporting that former Dallas Cowboys running back Marion Barber III was found dead in his apartment in Frisco, Texas on Wednesday.

The cause of death is currently unknown, but police are currently investigating.

The Cowboys released the following statement on Wednesday night:

“We are heartbroken by the tragic death of Marion Barber Ill. Marion was an old-school, hard-nosed football player who ran with the will to win every down. He had a passion for the game and love for his coaches and teammates. Our hearts go out to Marion’s family and friends during this difficult time.”

Statement from Dallas Cowboys

The 38-year-old played seven seasons in the NFL from 2005 to 2011. He spent six years in Dallas and one in Chicago.

A 2007 Pro Bowler, Barber rushed for 4,780 yards and 53 touchdowns in his career.

He retired prior to the start of the 2012 season.