There are the rookies who haven't gotten enough reps and/or been mentioned enough by beat writers and other national media who've attended Ravens camp. As of now, I don't believe these players can have a fair or accurate grade put on them.
Crockett Gillmore, Tight End
The third-round pick out of Colorado State isn't expected to contribute much as a rookie with Pro Bowlers Dennis Pitta and Owen Daniels ahead of him.
Brent Urban, Defensive Tackle
Drafted in the fourth round of this year's draft, Urban's season is over after he suffered a torn ACL early in training camp. He was only expected to provide depth along the defensive line as a rookie, but he won't even do that now.
Lorenzo Taliaferro, Running Back
Taliaferro was the Ravens' second fourth-round pick in this year's draft, but he's facing an uphill battle to get playing time as a rookie. He was listed fourth on the initial depth chart, and that's reflective of how little work he's gotten in training camp with Ray Rice, Bernard Pierce and Justin Forsett ahead of him.
John Urschel, Offensive Lineman
A fifth-round pick in the 2014 NFL draft, Urschel is likely going to be a developmental offensive lineman as rookie. He was listed as the third-string right guard on the first depth chart.
Keith Wenning, Quarterback
A sixth-round pick out of Ball State, Wenning is unlikely to play as a rookie with veterans Joe Flacco and Tyrod Taylor ahead of him. The good news is Taylor is a free agent next year, so Wenning could be the primary backup behind Flacco in 2015.
Michael Campanaro, Wide Receiver
The seventh-round pick out of Wake Forest has had some nice flashes in camp, but a rib injury has already cost Campanaro some time. He was injury-prone in college and missed five games in 2013 after suffering a broken collarbone.