Peterson was with the Seahawks for three seasons, and the Linebacker generally patrolled the outside. Peterson was a Pro Bowl Selection in all three of his years in the Pacific Northwest, and he had a 10 Sack year in 2006, which he followed up with a 9.5 Sack year. Overall, he had 24.5 Sacks and 249 Tackles for Seattle.
Peterson was traded after the 2008 season to the Detroit Lions, where he played two more years before retiring.