Both clubs left their fans, neutral observers and probably themselves shaking their heads last weekend.
The Panthers, who had the league's best record at 15-1, pummeled two-time defending NFC champion Seattle 31-0 in the first half. Carolina's defense got consistent pressure on Russell Wilson and shut down the ground game. Cam Newton, Jonathan Stewart and Greg Olsen were dominant on offense.
Then it all soured, the Seahawks scored the next 24 points and probably were an onside kick recovery away from forcing overtime. Newton admitted his team needs more killer instinct.
Arizona displayed that trait in overtime against Green Bay, sparked by Larry Fitzgerald's weaving 75-yard catch and run. But the Cardinals never should have the extra work, allowing a 60-yard completion on fourth down, then a 41-yard desperation pass on the final play of regulation.
Each team has an outstanding defense, but the feeling here is lots of points will be had in Sunday's late game.
The majority of those points will be scored by the hosts, who have won 12 in a row at home.