In this article KFFL breaks down the fantasy football sleepers of the week. We will avoid marquee names because players of that caliber are rarely benched, regardless of their matchup. Instead, we will focus on the players that make your fantasy lineup decisions stressful each week. Read on to learn which midrange to low-end players you wouldn't necessarily consider that you need to get into your lineup.

Note: All statistics are from Week 3 to Week 6, unless otherwise stated.

Fantasy football sleepers: Defensive teams

Seattle Seahawks vs. Arizona Cardinals

Fantasy value: High-end No. 1

• The Seahawks are averaging 4.67 sacks, 1.00 interceptions and 1.00 fumble recoveries per game. They're coming off a six-sack performance against the Chicago Bears, and they have caught fire under head coach Pete Carroll.
• This week, they draw rookie quarterback - ding! - Max Hall and an unidentifiable Cardinals' offense. 'Zona has allowed 5.00 sacks, 1.33 interceptions and 1.00 fumbles lost per contest in their last three games. In Weeks 4 and 5, primarily directed by Hall, that was 6.50, 1.50 and 0.50, respectively. A rookie quarterback at Qwest Field isn't looking at a friendly atmosphere.
• Seattle's pass D remains a weak link, but with their ability to bring down opposing QBs, they can still be valuable in leagues that don't emphasize points and yards allowed.
• Seattle faces the Cards in Week 10, too, and they tangle with the Oakland Raiders in Week 8. You should look to acquire them if you're thinking ahead.

San Francisco 49ers at Carolina Panthers

Fantasy value: Low-end No. 1

• The Niners' D is widely owned but has dwindled in ownership and lineup use since the start of the season. They've been steady but not outstanding in the last month, recording 2.25 sacks and 1.25 interceptions per game. 
• The Panthers allowed 3.00 sacks, 1.33 interceptions and 1.33 fumbles lost per game in quarterback Jimmy Clausen's three starts. Will the switch back to Matt Moore, who has completed 42.4 percent of his passes and been sacked eight times, really help Carolina much? Don't count on it.
• Defensive end Justin Smith (hand) and linebacker Manny Lawson (ribs) are day-to-day, but Smith is expected to play. If Lawson were to be limited or miss time that could hinder this D, but the Panthers are a decent enough matchup that they could overcome these injuries.