Defense/Special Teams Sleepers

Like many people i am in a ESPN fantasy league witch includes a "defence/special teams" spot. I believe that this is one of the most underrated aspects of fantasy today even though allot of times it produces a good amount of points. That is why i am giving you two team who in my opinion are underrated. The Chargers and the Bears have had top defences in past years and now i find them at 50 and 30 percent ownership in the ESPN fantasy leagues. That's ridiculous considering the great players found of both of this defensive rosters(does Sean Merriman and Brian Urlaucher ring a bell?)For now i leave you with this....consider your options for defences and don't come into the draft not knowing who you want to pick like a lot of people do.