Linval Joseph of East Carolina is 6-foot-5, 328, so no problem with size in the middle. Here's the report from NFL Draft Scout.
Pass rush: Looks like a nose tackle but plays like a three-technique, penetrating and getting consistent pressure when fresh. Good closing speed for his size, swallows up quarterbacks that lack great elusiveness. Straight-ahead runner, however with limited lateral quickness, will not break down to change direction in the backfield.
Run defense: Adequate anchoring against double-team blocking due to thick legs and a wide upper body and will move to the ballcarrier after he's through the line. Can be moved and doesn't rip off blocks to stop the play before it starts. Willing to chase down the line and downfield between the tackles if he sees the ball in his area. Susceptible to the cut block. Not strong enough to arm tackle backs in the hole.
Explosion: Surprising quickness off of the snap for his size, gets into his gap in a hurry when fresh. Does not deliver much pop to his opponent with his hands on initial contact, however, relying on athleticism to get the job done.Strength: Does not play as strong as you would think because he plays high and does not consistently use his hands to disengage. Does not reset his hands, get leverage by getting his hands under pads, or attempt to churn his legs after contact to push his man into the backfield.
Tackling: Length and wide body allows him to engulf players in his path. Gives effort to chase, can be effective when well rested. Gets a lot of assisted tackles because of his hustle. Does not sink his hips when approaching the ball, however, and is easily eluded by quicker players in space.
Intangibles: Part of a rotation inside, possibly due to stamina issues. Looks to be winded when playing two consecutive series. Dropped 70 pounds after his freshman season (came to EUC at more than 370 pounds) due to a back injury, regained 20 before 2008 season.