Nelson, a fifth-round draft pick in 2015, has impressed in the organized team practices this month. That continued Tuesday with a couple of fine over-the-shoulder grabs in coverage, plays which displayed Nelson's hands and speed.
Coach Bruce Arians sees Nelson's confidence growing with each workout.
"He has a very unique skill in tracking the ball that the great ones have when the ball's coming over your opposite shoulder," Arians said. "When you have a little fast guy that can do that, you have a special one.
"Every day, he's making a big play or two," Arians added. "Getting a little bit stronger. He might be a buck-61 right now. We're going to try to get 4 more pounds on him."