NFC East

Dallas Cowboys quarterback Dak Prescott goes down with gruesome ankle injury

ARLINGTON, Texas — What started as a routine run by Dak Prescott became the worst nightmare for the fifth-year quarterback and the Dallas Cowboys.Prescott knew something was wrong as soon as he was tackled after gaining 9 yards on the play.His right foot got caught in the turf and was turned the opposite direction. He quickly waved his hand for assistance from the sideline.The injury cart came out and his despondent teammates gathered a visibly emotional Prescott as he sat there for a several minutes being tended to by Cowboys doctors before being lifted on the cart.On the field next to coach …