The Washington Redskins continued to add beef to their defensive line Thursday, signing tackle Terrance Knighton.

The deal is for one year and $4 million, according to reports by ESPN and NFL Network.

Knighton joins Stephen Paea and Ricky Jean Francois as additions to Washington’s line. Paea signed a four-year deal reportedly worth $21 million on Wednesday.

That trio joins a group that includes Jason Hatcher, Chris Baker, Frank Kearse and Kedric Golston.

Knighton, 6 feet 3 and 331 pounds, has anchored the Denver Broncos’ run defense for the past two years.

Drafted in the third round in 2009 by the Jacksonville Jaguars, he has 201 tackles and 12.5 sacks in his six seasons.