Posted by ESPN.com's Mike Sando
The Seahawks kept only seven defensive backs pending Lawyer Milloy's expected signing.
What does it mean? Well, the team kept only seven on its opening-day roster last season and the Seahawks haven't kept more than eight on their Week 1 rosters since 2003. The 49ers, in contrast, have kept at least 10 defensive backs on their Week 1 roster in each of the last four seasons.
That is the sort of perspective I'm hoping to provide by comparing initial 53-man positional roster counts against Week 1 counts since 2003. Seattle has never kept more than 10 defensive linemen on its Week 1 roster during the period in question. The Seahawks have 11 now, but for how long? If they choose to supplement another position, defensive line might be a logical place to clear a roster spot, based purely on numbers.
I'll provide similar charts for the other teams in the division. Seattle's roster moves jumped out because the team released a projected starter in free safety Brian Russell. Note that the numbers from 2003-2008 reflect opening-day counts. Current rosters figure to change as the week progresses.