From Yahoo! Sports. Check out the entire piece on this link.

Last week was great if you were a defending division champion in the NFC and a very lousy one if you were a defending division champion in the AFC.

The New England Patriots, Baltimore Ravens, Houston Texansand Denver Broncos all lost in Week 7, the latter their first setback of 2013.

The Washington Redskins, Green Bay Packers, Atlanta Falcons and San Francisco 49ers all won last week.

Pretty simple, huh?