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,

After that, the Seahawks traveled to San Francisco and beat the 49ers at the last minute. On the East Coast, the Bills ruined the Chiefs' perfect season with a 30-21 win. Rounding out the day, the Bengals came back from down 21 points, only to lose in the final seconds to the Chargers on Sunday Night Football. Here are the highlights!