Early years

In his high school career, Jamison recorded 217 tackles (89 solo, 71 for losses), 45 sacks, and 14 forced fumbles. In his senior year, he recorded 89 tackles (31 for losses), 21 sacks, 14 quarterback hurries, three forced fumbles, recovered four fumbles, and defended 12 passes. Jamison was selected to play in the 2004 U.S. Army All-American Bowl in San Antonio, Texas.

College career

2004

He enrolled in the University of Michigan and in his first season with the team he recorded four tackles before enduring a season-ending injury.

2005

Jamison made 10 tackles (4 for losses) in 10 games played, and 3 sacks. His first career sack was against Eastern Michigan University. At the end of the season he was named to The Sporting News Freshman ALL-Big Ten team. He recorded a sack in the 2005 Alamo Bowl against the Nebraska Cornhuskers when he sacked Zac Taylor in which Michigan lost 28-32.

2006

He started the season in the depth chart as a backup defensive end to Rondell Biggs. He missed the season opener against Vanderbilt. He returned to see action against the Central Michigan Chippewas when he played as a backup. He recorded his first sack of the season when he sacked future Cleveland Browns Brady Quinn in the annual game against the Notre Dame Fighting Irish. He finished the season with 13 tackles and 5 sacks, including 3 tackles in the 2007 Rose Bowl.

2007

He started all 13 games at defensive end and was credited with 52 tackles (10 for losses), 5.5 sacks, 1 interception, 3 passes defended and two forced fumbles.

2008

As a fifth-year senior, he served as co-captain.

Professional career

Pre-draft

Jamison ran a 5.09 40 yard dash and did 21 reps on the bench press at the NFL Combine.

Houston Texans

Jamison was signed as an undrafted free agent by the Texans.

[ Source: Wikipedia ]