SEATTLE — Maybe it makes sense that as the weekend began, the battle to become the ninth coach in Seahawks history had nine known candidates. There might be more, of course, as the Seahawks could be doing some investigatory work behind the scenes on coaches whose names have yet to surface in the search to find a replacement for Pete Carroll. There are nine candidates who one or more outlets have reported that the Seahawks have scheduled to interview. A few have interviewed virtually but none in person as of Friday afternoon, with the Seahawks beginning the interview process Wednesday. Who are …