Peterson attended Valley Forge Military Academy and College for two years before attending Michigan State. In two seasons at Valley Forge, he recorded 39.5 sacks and was first-team NJCAAAll-America and Seaboard Conference Defensive Player of the Year as a sophomore. Peterson played college football at Michigan State University for his junior and senior year. As a junior, he was the honorable mention All-Big Ten pick by the media. As a senior, he was an All-American selection by Football News and the Sporting News after recording 15 sacks. In his two years at Michigan State he recorded 140 tackles and 25 sacks in only 23 games.
Peterson was drafted by the San Francisco 49ers 16th overall in the 2000 NFL Draft. The 16th overall pick was acquired by San Francisco in a trade with the New York Jets. The Jets were originally given the pick by the New England Patriots, as a result of the controversy of Bill Belichick leaving the Jets’ head coaching position a few months prior to take the same role with the Patriots. As a rookie he started seven of 13 games recording 47 tackles, four sacks, and two interceptions. In 2002 Peterson was elected to the Pro Bowlfor the first time after posting 94 tackles. In six seasons in San Francisco he recorded 394 tackles, 21.5 sacks, and five interceptions in 79 games and was elected to two Pro Bowls.
Seattle Seahawks
Peterson signed with the Seattle Seahawks before the 2006 season. In his first season in Seattle, he was selected to the Pro Bowl for the third time after recording 89 tackles and a career-high 10 sacks. In his second season with the Seahawks he was selected to the Pro Bowl for the second straight year after posting 74 tackles and 9.5 sacks. During the 2008 NFL Training Camp, Peterson switched jersey numbers from #59 to #98, the number he wore during his previous tenure at San Francisco. In his third season with the team, Peterson made 86 tackles and five sacks, and was selected to his third consecutive Pro Bowl. In three seasons in Seattle, he recorded 249 tackles, 24.5 sacks, and three interceptions in 48 games and was elected to three Pro Bowls.
Detroit Lions
The Seattle Seahawks traded Peterson to the Detroit Lions for defensive tackleCory Redding and a 2009 fifth-round pick on March 14, 2009. On January 5, 2011, Peterson was given his release by the Lions.
