Instinctive, athletic running back who has the foot quickness to create for himself when lanes constrict or blocks are missed. Yeldon lacks the ball security, top-end speed and desired tackle breaking to be a full-time starter. He’s a versatile, rotational back with the ability to step in and step up. – Lance Zierlein

All-purpose running back with an ability to hit big plays from time to time, but no value as an every-down player. Some teams might view Williams as a luxury talent with minimal value due to his lack of size and natural position fit, while other teams will see him as a chess piece that they can deploy to create mismatches and use to stress defenses. His kick-return ability adds value, but there’s likely a ceiling on just how highly he will be drafted. – Lance Zierlein

Williams is a big, talented athlete who is still finding his way as a running back. He seemed almost content to lose his job in 2014 and teams will be turning over every rock looking for information on his character. As a one-cut runner with exceptional burst and rare physical traits, Williams could become a very good starter in a zone-based scheme, but his floor is very low based on character and scheme fit. – Lance Zierlein

Could get pushed into the fullback genre when, in reality, he’s a running back and an instinctive one at that. Varga’s ability to run and catch gives him a shot at the back end of a depth chart, but he might have to show he can take snaps as a move fullback and shine on special teams to make an NFL team. – Lance Zierlein

Difficult projection due to running-lane limitations with below-average blocking in front of him. Appears to have decent top-end speed to go with legitimate twitch and could get a look as a slot receiver, similar to the move the Patriots' Julian Edelman made out of Kent State. – Lance Zierlein

Compact running back with squatty lower body and a short-striding style that allows him to get to his top speed quickly in the open field. Robinson appears to be lacking an NFL burst and the shiftiness needed to create more yardage for himself on the second level. He has good short-area footwork and is effective as a pass-catcher but is lacking a differentiating talent from the rest of the backs in this draft. – Lance Zierlein

Compact, powerful running back who runs just as powerfully on his 35th carry (back-to-back games of 40 carries) as he does to start the game. While he finishes with brute force, he possesses the vision and lateral movement of a finesse runner. He is more than capable of handling a starter’s workload in the NFL, and had Purdue’s safeties ready to tap out by the end of that game last season. His character must be vetted carefully, but the tools and the talent are those of a league starter. – Lance Zierlein

All-purpose running back with a lean frame and a big heart. Showed consistency of effort and production during his time at Missouri. His value as a runner is limited due to his size, but he has the potential to become a legitimate target out of the backfield and might warrant some reps in camp as a slot receiver. Murphy can step in and immediately challenge for the top spot as a kickoff and/or punt returner. – Lance Zierlein

Limited, dime-a-dozen running back who will get some attention from teams for his willingness to stick his nose into blitzers and protect the quarterback on third downs. Has just three kickoff returns over last two seasons, so he’s likely a camp body who must find a way to shine with limited reps. – Lance Zierlein

Langford showed improvement from 2013 to 2014, but he doesn’t accelerate through contact and will usually get what is blocked. Without an ability to maximize his yards with each carry, teams could peg him as a “committee back” with an ability to play on third downs. – Lance Zierlein