What does it mean? What are the pertinent factors (and, perhaps, tiebreakers) prominently in play as each conference's seven-team bracket begins to crystallize? All will be explained and analyzed up to the point when the postseason field is finalized on Sunday night,

In the AFC, the Buffalo Bills knocked off the NFL's last undefeated team on Sunday afternoon. The Bills grabbed a 30-21 win over the Kansas City Chiefs, which moved them to 9-2 on the year. The Chiefs, however, still hold a slight edge in the AFC standings and are in control of the top seed.