Clark was a Bronco for about six weeks before Denver released him. Clark came to Denver on a one-year, $5.45 million contract from the defending champion Kansas City Chiefs in the hopes of boosting a flagging pass rush.
Clark only appeared in two games for Denver, where he recorded only two tackles.
The Broncos have not had a lot of success with free agent pass rushers the past few years, signing Clark and ex-Cowboy Randy Gregory. Gregory was benched and then traded to the San Francisco 49ers earlier this month.
Clark looks to get back into the playoff picture with the Seahawks, who are now 4-2.