Grading Cowboys rookies through 5 games: Who looks best, what makes Taco Charlton's situation worse

Through the first five games last year, rookies Dak Prescott and Ezekiel Elliott were already showing signs of being cornerstone pieces for the Cowboys franchise. Elliott had 546 rushing yards and five touchdowns during Dallas’ 4-1 start. Prescott was completing 70 percent of his passes and still