Hunter Renfrow, Clemson: If Renfrow (5-10, 184 pounds) and D.K. Metcalf (6-3, 228 pounds) stand next to each other, there's no question who the football player is by first glance. Renfrow may not be the most physically imposing player but after watching him in Indy, I saw exactly why he was the one who caught Clemson's game-winning touchdown pass in the national championship two seasons ago. His routes are so precise and he's squeaky clean in and out of his breaks -- demonstrated in his 6.8-second three-cone drill (third-fastest among all receivers at this year's combine). A silent assassin, Renfrow was locked in and did his job with flying colors. To put it simply, he brought his lunch and went to work.