DENVER (AP) — The Denver Broncos continued bolstering their offensive line on Thursday when they agreed to a five-year contract with former Seattle Seahawks tackle Russell Okung.

Selected by Seattle with the sixth pick in the 2010 draft out of Oklahoma State, Okung started 72 regular-season games and a dozen playoff contests for the Seahawks over the last six seasons. He was a Pro Bowler in 2012.

Okung's 20 sacks allowed in his career rank as the fewest in the league among tackles who have started at least half of their team's games in each season since 2010.

The Broncos also added guard Donald Stephenson in free agency and have let go of veterans Ryan Harris, Evan Mathis and Louis Vasquez.