And so far , fellow defensive back Chris Harris believes he 's lived up to his promise .
Roby , the Broncos ' first - round draft pick in 2014 , vowed this year to improve on the C - grade he gave himself for his rookie season .
So far , fellow defensive back Chris Harris believes Roby 's lived up to Roby 's promise .
Roby , the Broncos ' first - round draft pick in 2014 , vowed this year to improve on the C - grade he gave himself for his rookie season .