sentences:  In 2011, the Cowboys drafted DeMarco Murray which put Choice's roster sport in jeopardy, after injuries including a hamstring strain and a minor knee injury limited him to play in only one out of four preseason games.He began the regular season as the backup running back behind Felix Jones.After Jones suffered a sprained ankle, he was named the starting running back in the week 7 game against the St. Louis Rams, but Murray had a performance for the ages, breaking several league and franchise rushing records.