If I am correct. The Seahawks Roster is 36% undrafted free agents. Mike Morgan, Heath Farwell, John Lotulelei, Brandon Browner, Chris Maragos, Jeron Johnson, Jon Ryan, Steven Hauschka, Clint Gresham, Derrick Coleman, Doug Baldwin, Jermaine Kearse, Lemuel Jeanpierre, Alvin Bailey, Chris Clemons, Tony McDaniel, Benson Mayowa, Stephen Williams, and Michael Bennett.
I am not sure how this compares to other teams, but that seems like a pretty high number.
I can see these type of players really buying into the always compete mantra that Pete loves. A consistent chip on your shoulder can go a long way.
Also, lots of cheap talent.