Source: Seymour will get franchise tag

Oakland invested a 2011 first-round pick to get defensive end Richard Seymour from New England, and it seems determined not to lose him.

The Raiders will use their franchise tag on Seymour if the two sides cannot agree on a long-term contract extension, according to a source close to the situation.

The move would be neither surprising nor cheap. The franchise tag for defensive ends is $12.398 million. The deadline for teams to use their franchise tags on prospective free agents is next Thursday.

Oakland is in a similar situation to its Bay Area neighbor, the San Francisco 49ers. If the 49ers cannot get a long-term extension done with their free-agent defensive tackle, Aubrayo Franklin, then San Francisco will use its franchise tag on him.

The franchise tag for defensive tackles is $7 million.

Adam Schefter is an ESPN NFL Insider. ESPN.com NFL writer James Walker contributed to this report.