Big games for SF and Seattle this week. If SF beats NO, they still control their own destiny for a #1 seed by beating the Rams and Falcons at home and then winning the big showdown with Seattle in week 17. If they lose at New Orleans, they are probably looking at a wild card unless the Rams can beat Seattle this week.
Just for curiosity's sake, I looked up the San Fran-Seattle tiebreak scenarios and if the teams should finish with identical records, Seattle gets the division based on the fifth tiebreaker, which is Strength of Victory (meaning win-loss records of non-common opponents). San Francisco has wins over the 3-9 Redskins and 9-3 Packers, while the Seahawks have beaten Minnesota (8-4) and Philadelphia (5-7).
You've got to figure Seattle has the edge here since Washington isn't likely to help the Niners' cause. I just wonder how long Seattle can keep winning razor's edge games. They've played 10 one-score games, and their point differential is just +36. At some point the law of averages would seemingly have to catch up with them.