FILE - In this Sept. 26, 2010, file photo, Washington Redskins running back Clinton Portis looks on before the start of an NFL football game between against the St. Louis Rams in St. Louis. Portis is announcing his retirement, nearly two years after he played his last NFL game. The Redskins said Tuesday, Aug. 26, 2012, that Portis and owner Dan Snyder will hold a retirement news conference Thursday. (AP Photo/Jeff Roberson, File)