Week 12 was another up and down week for our fantasy football defense picks. One of our targets, the Los Angeles Chargers, finished as the top-scoring unit when they shut down the Dallas Cowboys. Unfortunately, both of our other targets, the Cincinnati Bengals and Atlanta Falcons, finished outside the top 12.

It's now on to Week 13 and everyone needs a win -- we're either jockeying for playoff position or just trying to sneak into the playoffs.

As always, this column searches the waiver wire to identify low-owned D/STs that have a great matchup for fantasy production. The focus will be on teams on in about 50% or fewer of Yahoo fantasy leagues, with our goal being to find teams poised to finish as a top-12 scorer.

Here are three defenses most likely sitting on your waiver wire that you can pick up and play in Week 13.