Harrison was expected to come back strong in 2007 after his 2006 campaign was hampered by a knee injury and concussion that limited him to 42 tackles -- 27 solo. But this past season couldn't have gotten off to a worse start. He tore his left ACL in spring practice, then was arrested on a drug charge that led to him sitting out Arkansas's game against Troy. Still, Harrison managed to overcome not being 100-percent healthy to post decent regular-season numbers. He had 72 tackles -- 37 solo -- with 5.5 tackles for loss, 1.5 sacks, nine pass breakups and seven quarterback hurries. He was named second-team All-Southeastern Conference by The Associated Press. Harrison has a good burst for someone his size. His strength allows him to be tough at the point of attack. His ability to occupy multiple tacklers makes him a force against the run. He is good at shedding blockers to make plays. He knows how to utilize leverage. Most scouts believe he hasn't reached his potential. One of the biggest concerns about Harrison is he doesn't go hard every play. While he projects to have the ability to move to defensive end, he hasn't shown the pass rushing skills to make that likely. He doesn't make many plays beyond the routine. Teams will have a lot of questions about his character after his arrest. There are also concerns about his knee. He needs a good combine workout. He could be a third-round pick, but may fall further.