A fantasy defense can often be the deciding factor in whether you win or lose.
Just look at Week 1 when seven defenses put up 15 points or more. That's more points than studs like Chris Johnson, Roddy White, Jamaal Charles and Larry Fitzgerald put up.
And they weren't just the top defenses either. Among the top scorers were the San Francisco 49ers, Houston Texans and Washington Redskins. Not your typical stingy defenses.
When dealing with fantasy defenses, it all depends on the matchup. The 49ers and Texans are hardly among the league's elite defenses, but they played inferior opponents last week.
Tedd Gin Jr. propelled the 49ers special teams with two return touchdowns while the Texans dominated a Peyton Manning-less Indianapolis Colts team.
As we look ahead to Week 2, here are three defenses that might not be owned, but will have a big fantasy day.