Defensive lineman Richard Seymour has agreed to a two-year extension with the Raiders that will make him the highest-paid defensive player in football, a team source told ESPN NFL Insider Adam Schefter. Bears defensive end Julius Peppers makes an average of $14 million per year and while Seymour's exact numbers will not be known until he signs the deal, the numbers will come in north of Peppers'. SI.com first reported Seymour's extension. The website said that Seymour's contract is potentially worth $30 million and contains $22.5 million guaranteed. The 31-year-old defensive end went to the Pro Bowl last season, making a big impact in his second season in Oakland after being acquired in a trade from New England. He had 5½ sacks and provided leadership for a young defense that features two rookies starting in the front seven. Read more: http://sports.espn.go.com/nfl/news/story?id=6127980