Rookie Quenton Nelson as good as advertised on Colts' O-line

Quenton Nelson was made a starter from the moment he arrived at minicamp. Zach Bolinger/Icon Sportswire

A breakdown of the Indianapolis Colts' 2018 draft class and its progress after three weeks of training camp:

Quenton Nelson, OL, Round 1: It was quickly easy to realize why the Colts took the former Notre Dame star at No. 6 overall. The first offensive lineman taken in the April draft has been the starting left guard since the first time he took the practice field during offseason workouts.

Darius Leonard, LB, Round 2: Barring any kind of change, Leonard is in line to start at one of the outside linebacker positions. His athleticism allows him to drop into coverage when necessary. He was the first player to intercept quarterback Andrew Luck in training camp.

Braden Smith, OL, Round 2: Smith was expected to push veteran Matt Slauson for the starting right guard position, but Slauson has basically locked down that spot. The Colts have given Smith some snaps at right tackle during camp, because that's the one position along the offensive line that doesn't have a set starter yet.

Kemoko Turay, DE, Round 2: Turay has been listed as a starter most of training camp on the depth chart, but is having to play catch-up after missing some time with a knee injury.

Tyquan Lewis, DE, Round 2: Lewis has been backing up Denico Autry at tackle along a deep defensive line. He and Autry give the Colts strength and speed in the middle of the line.

Nyheim Hines, RB, Round 4: Hines' speed can't be questioned. His ability to hold onto the ball can be, though. The NC State product has had a difficult time holding onto the ball while returning kicks and punts. He will have to improve in that area if he expects to keep that job and get snaps in the backfield.

Daurice Fountain, WR, Round 5: Fountain missed some time early in camp with a knee injury. Now he's battling a handful of other receivers for the wide open fourth receiver spot.

Jordan Wilkins, RB, Round 5: Wilkins hasn't been flashy, but his hard-running style has impressed the coaching staff. If Marlon Mack isn't back from his hamstring injury, Wilkins could possibly start the Week 1 game against Cincinnati with Robert Turbin (performance-enhancing drugs) suspended the first four games.

Deon Cain, WR, Round 6: Cain's season ended when he tore his ACL against Seattle in the first preseason game. The former Clemson receiver was impressive early in camp because of his ability to use his size to get the ball. He was in line to be the team's fourth receiver.

Matthew Adams, LB, Round 7: It's been a slow start to Adams' rookie season. He's buried behind Najee Goode and Antonio Morrison at outside linebacker.

Zaire Franklin, LB, Round 7: The former Syracuse linebacker has been backing up fellow rookie Skai Moore at middle linebacker while starter Anthony Walker has been out with a groin injury.