School: Boston College
40-Yard Dash: 4.70 (est)
Much like Rodrique Wright, Kiwanuka has a very fast first step. Combine this fact with his speed and he will constantly be in the backfield recording sacks. He has a motor that never stops, which allows him to be around and/or involved in every play. He's a very smart player, which allows him to eliminate the stupid mistakes that many players make.
Mathias isn't strong enough to take on most tackles, and has to rely on speed to much to get past blocks. He also isn't very good at getting off blocks to stop the run plays at the line of scrimmage. These are two things that will hurt him in the NFL, but are things that can be corrected with work.
Mathias would have more than likely been a top 10 pick last year, but decided to come back for his final season. Plays much the way that Dwight Freeney does, using speed to get around blocks. However, Freeney can also stop the run.