2. Jalen Moreno-Cropper
Vaughn isn't the only long-shot rookie who's been making waves at Cowboys training camp.
Jalen Moreno-Cropper, who's undrafted out of Fresno State, has earned rave reviews for his play during practice. He's used his blazing speed (4.40-second 40-yard dash at the NFL Combine) to get by defenders and even got the better of Trevon Diggs during a red-zone practice on August 1.
I'm not advocating that Moreno-Cropper should steal a starting job. CeeDee Lamb, Michael Gallup, Brandin Cooks, and Jalen Tolbert likely already have the top four spots locked down barring any serious injuries.
However, JMC would still be useful as the No. 5 WR. On top of his NFL-ready speed, he's coming off a career year at Fresno State that saw him turn 83 receptions into 1,086 yards and five touchdowns.
Even if he can't carve out a role in the offense, Moreno-Cropper still has value in a special teams role. Dallas was among the best when it came to returning balls last season and likely would get the most out of the exciting rookie in a return role.
Consistent play throughout the preseason will only help JMC go from a roster long shot to a lock.