Photo of Devon Johnson

Combine Results

5.31 ?

Draft Analysis:

  • 6'0" Height
  • 31 1/4" Arm Length
  • 238LBS. Weight
  • 9 1/4" Hands


It's not tough to see why "Rockhead" earned that moniker -- no one wants to get in the way of this 6-1, 243-pound freight train when he's healthy. The 2014 first-team All-Conference USA pick accumulated 1,767 yards and 17 touchdowns rushing as a junior after lining up for two years as a tight end. His receiving skills (12 catches, 218 yards, two scores in 2013) actually give him a chance to take on an H-back role. Unfortunately, Johnson could only play seven games (five starts) in 2015 due to a back injury (593 rush yards, five TD). So he'll need to prove his health before proving he can play on Sundays.

Pro Day Results

40-yard dash: 4.59 seconds
Vertical: 33 inches
Broad jump: 9 feet, 5 inches
Short shuttle: 4.6 seconds
3-cone: 7.09 seconds



Big boy who is a straight banger. Nicknamed "Rockhead" which fits his running style. Will drop pads, accelerate and drive through would­-be tacklers. Has thick, powerful legs that he continues to churn through initial contact. Will take tacklers for a ride if they try and tackle him high. Put together a monster 2014 campaign with 29 carries for 15-plus yards. Makes early decisions and will hit the gas quickly. Has more juice around the corner than linebackers give him credit for. Play speed is good for his size and can hit a big run if he gets up a head of steam. Good inside zone runner who presses line of scrimmage then maintains a tight track off the hip of his blocker. Short-yardage winner. Was a terrific special teams cover man over first two seasons at Marshall.


A one-­decision runner. Reads the hole and then mashes the gas rather than continuing to look for the second move. Limited as a runner. Doesn't have the flexibility or loose hips for quick cutting and creativity at the line of scrimmage. Not as balanced as expected. Despite coming into Marshall as tight end, looks disinterested as a pass catcher and had minor production in that area despite having some ability. Needs to improve focus in pass protection. Ball security needs work after fumbling five times over last 290 carries. Missed six of final eight games in 2015 with a back injury.

Draft Projection

Rounds 5 or 6

NFL Comparison

Jerome Felton

Bottom Line

Bruising back who was unable to prove to scouts that he could replicate his big 2014 campaign due to a back injury that bothered him for more than half the year. "Rockhead" is a power back who might have enough play speed to fit into a speciality role as goal line back and an immediate special teams contributor. While teams will certainly look at him as a fullback, his value lies in moving the chains and punishing second-level players.
-Lance Zierlein
Grade Title
9.00-10 Once-in-lifetime player
8.00-9.00 Perennial All-Pro
7.50-7.99 Future All-Pro
7.00-7.49 Pro Bowl to All-Pro Ability
6.50-6.99 Good NFL Starter with Pro Bowl Potential
6.00-6.49 Chance to become good NFL starter
5.70-5.99 Could become early NFL starter
5.30-5.69 Backup or eventual starter
5.15-5.29 Developmental prospect or special teams potential
5.01-5.14 Back end of the roster
5.00 50/50 Chance of making the roster