Chancellor's agent, Alvin Keels, announced the four-year extension on his Twitter account. The team was expected to formally announce the deal later Monday.
Chancellor, who turned 25 earlier this month, has grown from being a fifth-round pick out of Virginia Tech in 2010 into the hard-hitting anchor in Seattle's talented secondary. In 2011, Chancellor was a Pro Bowl selection in his first season as a starter, when he had 73 tackles, four interceptions and 13 passes defensed. Last season, Chancellor was used even more in run support and recorded a career-high 92 tackles.
Seattle's front office did not hide its desire to get a deal done with Chancellor this offseason and doing that allows the Seahawks to turn toward other key players who have deals that expire in the next couple of years. Two other members of Seattle's secondary - All-Pros Earl Thomas and Richard Sherman - have deals that expire after the 2014 season and could be looking at big-money extensions when the time comes.
Chancellor spent his first season playing behind former All-Pro Lawyer Milloy, part of the maturation process the Seahawks hoped would lead Chancellor from being a raw rookie into a refined veteran. Chancellor started at Virginia Tech as a quarterback before moving to cornerback and rover, and finally settling at safety.
He showed great improvement as a rookie learning under Milloy, to the point that Chancellor was being used as an extra defensive back and getting significant snaps toward the end of the season. He took over the starting spot in 2011 when Seattle chose not to re-sign Milloy. Chancellor's play in his first season as a starter was rewarded with a Pro Bowl trip after he was voted in as a first-alternate for the game.