In a new offseason series, Insider takes an in-depth look at NFL teams before free agency begins March 12. What is each team's philosophy on offense and defense, biggest needs and one player who could make for an ideal signing in free agency?

Team philosophies

Offense -- This may be the most physical team in the NFL, and its power run game is a perfect example of that aggressive mindset. The offensive line is big and physical with well-defined zone blocking schemes, and the Seahawks are adept at getting to the second level and finishing blocks. In previous seasons the Marshawn Lynch run game was mostly between the tackles, but in 2012 they ran some wider stretch plays, with quarterback Russell Wilson doing a nice job of using the bootleg off the stretch/play-action look and rolls to the backside, as defenses overpursued the stretch and left Wilson with a lot of room to run.

The Seahawks will use two tight ends liberally to make their run game even more physical, and they will show two-back power sets with fullback Michael Robinson leading the way for Lynch. The passing game is basically a West Coast scheme with a lot of three-wide receiver looks, and Wilson will take more vertical shots than you might think -- especially off play-action and down the seams. They like to use the screen game, they are run-heavy in the red zone and Wilson is very good at the pump fake as his receivers make double moves.