After 2007, you should ALWAYS be worried. We really beat EVERYONE who had a threat to beat us in the SB after going 18-0
Cowboys (13-3) *NFC #1 Seed*
Colts (13-3) *AFC #2 Seed*
Chargers (11-5) *AFC #3 Seed* x2
Steelers (10-6) *AFC #4 Seed*
Giants (10-6) *NFC Wild Card*
Jaguars (10-6) *AFC Wild Card*
Browns (10-6)
Redskins (9-7) *NFC Wild Card*
..yet eventually still lost. Here's who I'm worried about in the AFC the most, in order..
1. Ravens (Had 10pt lead going into 4th quarter, elite defense, LOTS of threats on offense, though I don't think Flacco is special)
2. Colts (Only QB who could single handily win a game at Foxboro)
3. Chargers (Rivers is elite, defense is good)
4. Steelers (Great defense, Ben could extend plays)
5. Chiefs (Haven't faced yet)
6. Jaguars (Haven't faced yet)
7. Jets (45-3)