Brian Gramling looks at the biggest defensive difference-makers to change teams in the offseason, as well as scheme changes that impact players on many teams.
ESPN.com fantasy football individual defensive player rankings for the 2013 NFL season.
Jim McCormick previews individual defensive players (IDPs) for the 2013 fantasy football season.
Fantasy football IDP player rankings for the 2012 season
Jim McCormick previews individual defensive players for Week 2 and says the Rams' James Laurinaitis is already looking like an IDP star.